Plumb SubtitleParser.Factory into MatroskaExtractor

MatroskaExtractor will no longer be wrapped in SubtitleTranscodingExtractor, but instead use SubtitleTranscodingExtractorOutput under the hood.

FLAG_EMIT_RAW_SUBTITLE_DATA flag will be used to toggle between subtitle parsing during extraction (before the sample queue) or during decoding (after the sample queue).

The new extractor dump files generated by `MatroskaExtractorTest` now follow the new parsing logic and hence have mimeType as `x-media3-cues`.

PiperOrigin-RevId: 598616231

libraries/decoder_flac/src/androidTest/java/androidx/media3/decoder/flac/FlacPlaybackTest.java

@@ -33,6 +33,7 @@ import androidx.media3.exoplayer.audio.DefaultAudioSink;
 import androidx.media3.exoplayer.source.MediaSource;
 import androidx.media3.exoplayer.source.ProgressiveMediaSource;
 import androidx.media3.extractor.mkv.MatroskaExtractor;
+import androidx.media3.extractor.text.DefaultSubtitleParserFactory;
 import androidx.media3.test.utils.CapturingAudioSink;
 import androidx.media3.test.utils.DumpFileAsserts;
 import androidx.test.core.app.ApplicationProvider;
@@ -119,7 +120,8 @@ public class FlacPlaybackTest {
       player.addListener(this);
       MediaSource mediaSource =
           new ProgressiveMediaSource.Factory(
-                  new DefaultDataSource.Factory(context), MatroskaExtractor.FACTORY)
+                  new DefaultDataSource.Factory(context),
+                  MatroskaExtractor.newFactory(new DefaultSubtitleParserFactory()))
               .createMediaSource(MediaItem.fromUri(uri));
       player.setMediaSource(mediaSource);
       player.prepare();

libraries/decoder_opus/src/androidTest/java/androidx/media3/decoder/opus/OpusPlaybackTest.java

@@ -33,6 +33,7 @@ import androidx.media3.exoplayer.audio.DefaultAudioSink;
 import androidx.media3.exoplayer.source.MediaSource;
 import androidx.media3.exoplayer.source.ProgressiveMediaSource;
 import androidx.media3.extractor.mkv.MatroskaExtractor;
+import androidx.media3.extractor.text.DefaultSubtitleParserFactory;
 import androidx.media3.test.utils.CapturingAudioSink;
 import androidx.media3.test.utils.DumpFileAsserts;
 import androidx.test.core.app.ApplicationProvider;
@@ -126,7 +127,8 @@ public class OpusPlaybackTest {
       player.addListener(this);
       MediaSource mediaSource =
           new ProgressiveMediaSource.Factory(
-                  new DefaultDataSource.Factory(context), MatroskaExtractor.FACTORY)
+                  new DefaultDataSource.Factory(context),
+                  MatroskaExtractor.newFactory(new DefaultSubtitleParserFactory()))
               .createMediaSource(MediaItem.fromUri(uri));
       player.setMediaSource(mediaSource);
       player.prepare();

libraries/decoder_vp9/src/androidTest/java/androidx/media3/decoder/vp9/VpxPlaybackTest.java

@@ -34,6 +34,7 @@ import androidx.media3.exoplayer.source.MediaSource;
 import androidx.media3.exoplayer.source.ProgressiveMediaSource;
 import androidx.media3.exoplayer.video.VideoDecoderGLSurfaceView;
 import androidx.media3.extractor.mkv.MatroskaExtractor;
+import androidx.media3.extractor.text.DefaultSubtitleParserFactory;
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import org.junit.Before;
@@ -134,7 +135,8 @@ public class VpxPlaybackTest {
       player.addListener(this);
       MediaSource mediaSource =
           new ProgressiveMediaSource.Factory(
-                  new DefaultDataSource.Factory(context), MatroskaExtractor.FACTORY)
+                  new DefaultDataSource.Factory(context),
+                  MatroskaExtractor.newFactory(new DefaultSubtitleParserFactory()))
               .createMediaSource(MediaItem.fromUri(uri));
       player.setVideoSurfaceView(new VideoDecoderGLSurfaceView(context));
       player.setMediaSource(mediaSource);

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/source/chunk/BundledChunkExtractor.java

@@ -99,7 +99,16 @@ public final class BundledChunkExtractor implements ExtractorOutput, ChunkExtrac
                   subtitleParserFactory.create(representationFormat), representationFormat);
         }
       } else if (MimeTypes.isMatroska(containerMimeType)) {
-        extractor = new MatroskaExtractor(MatroskaExtractor.FLAG_DISABLE_SEEK_FOR_CUES);
+        @MatroskaExtractor.Flags int flags = MatroskaExtractor.FLAG_DISABLE_SEEK_FOR_CUES;
+        if (subtitleParserFactory == null) {
+          flags |= MatroskaExtractor.FLAG_EMIT_RAW_SUBTITLE_DATA;
+        }
+        extractor =
+            new MatroskaExtractor(
+                subtitleParserFactory != null
+                    ? subtitleParserFactory
+                    : SubtitleParser.Factory.UNSUPPORTED,
+                flags);
       } else if (Objects.equals(containerMimeType, MimeTypes.IMAGE_JPEG)) {
         extractor = new JpegExtractor(JpegExtractor.FLAG_READ_IMAGE);
       } else if (Objects.equals(containerMimeType, MimeTypes.IMAGE_PNG)) {
@@ -125,7 +134,8 @@ public final class BundledChunkExtractor implements ExtractorOutput, ChunkExtrac
       }
       if (subtitleParserFactory != null
           && !MimeTypes.isText(containerMimeType)
-          && !(extractor.getUnderlyingImplementation() instanceof FragmentedMp4Extractor)) {
+          && !(extractor.getUnderlyingImplementation() instanceof FragmentedMp4Extractor)
+          && !(extractor.getUnderlyingImplementation() instanceof MatroskaExtractor)) {
         extractor = new SubtitleTranscodingExtractor(extractor, subtitleParserFactory);
       }
       return new BundledChunkExtractor(extractor, primaryTrackType, representationFormat);

libraries/extractor/src/main/java/androidx/media3/extractor/DefaultExtractorsFactory.java

@@ -249,7 +249,7 @@ public final class DefaultExtractorsFactory implements ExtractorsFactory {
   /**
    * Sets flags for {@link MatroskaExtractor} instances created by the factory.
    *
-   * @see MatroskaExtractor#MatroskaExtractor(int)
+   * @see MatroskaExtractor#MatroskaExtractor(SubtitleParser.Factory, int)
    * @param flags The flags to use.
    * @return The factory, for convenience.
    */
@@ -442,6 +442,7 @@ public final class DefaultExtractorsFactory implements ExtractorsFactory {
                   && !(extractor.getUnderlyingImplementation() instanceof Mp4Extractor)
                   && !(extractor.getUnderlyingImplementation() instanceof TsExtractor)
                   && !(extractor.getUnderlyingImplementation() instanceof AviExtractor)
+                  && !(extractor.getUnderlyingImplementation() instanceof MatroskaExtractor)
               ? new SubtitleTranscodingExtractor(extractor, subtitleParserFactory)
               : extractor;
     }
@@ -490,7 +491,13 @@ public final class DefaultExtractorsFactory implements ExtractorsFactory {
         extractors.add(new FlvExtractor());
         break;
       case FileTypes.MATROSKA:
-        extractors.add(new MatroskaExtractor(matroskaFlags));
+        extractors.add(
+            new MatroskaExtractor(
+                subtitleParserFactory,
+                matroskaFlags
+                    | (textTrackTranscodingEnabled
+                        ? 0
+                        : MatroskaExtractor.FLAG_EMIT_RAW_SUBTITLE_DATA)));
         break;
       case FileTypes.MP3:
         extractors.add(

libraries/extractor/src/main/java/androidx/media3/extractor/mkv/MatroskaExtractor.java

@@ -56,6 +56,8 @@ import androidx.media3.extractor.PositionHolder;
 import androidx.media3.extractor.SeekMap;
 import androidx.media3.extractor.TrackOutput;
 import androidx.media3.extractor.TrueHdSampleRechunker;
+import androidx.media3.extractor.text.SubtitleParser;
+import androidx.media3.extractor.text.SubtitleTranscodingExtractorOutput;
 import com.google.common.collect.ImmutableList;
 import java.io.IOException;
 import java.lang.annotation.Documented;
@@ -80,19 +82,30 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
 @UnstableApi
 public class MatroskaExtractor implements Extractor {
 
-  /** Factory for {@link MatroskaExtractor} instances. */
+  /**
+   * @deprecated Use {@link #newFactory(SubtitleParser.Factory)} instead.
+   */
+  @Deprecated
   public static final ExtractorsFactory FACTORY = () -> new Extractor[] {new MatroskaExtractor()};
 
   /**
-   * Flags controlling the behavior of the extractor. Possible flag value is {@link
+   * Creates a factory for {@link MatroskaExtractor} instances with the provided {@link
-   * #FLAG_DISABLE_SEEK_FOR_CUES}.
+   * SubtitleParser.Factory}.
+   */
+  public static ExtractorsFactory newFactory(SubtitleParser.Factory subtitleParserFactory) {
+    return () -> new Extractor[] {new MatroskaExtractor(subtitleParserFactory)};
+  }
+
+  /**
+   * Flags controlling the behavior of the extractor. Possible flag values are {@link
+   * #FLAG_DISABLE_SEEK_FOR_CUES} and {#FLAG_EMIT_RAW_SUBTITLE_DATA}.
    */
   @Documented
   @Retention(RetentionPolicy.SOURCE)
   @Target(TYPE_USE)
   @IntDef(
       flag = true,
-      value = {FLAG_DISABLE_SEEK_FOR_CUES})
+      value = {FLAG_DISABLE_SEEK_FOR_CUES, FLAG_EMIT_RAW_SUBTITLE_DATA})
   public @interface Flags {}
 
   /**
@@ -105,6 +118,12 @@ public class MatroskaExtractor implements Extractor {
    */
   public static final int FLAG_DISABLE_SEEK_FOR_CUES = 1;
 
+  /**
+   * Flag to use the source subtitle formats without modification. If unset, subtitles will be
+   * transcoded to {@link MimeTypes#APPLICATION_MEDIA3_CUES} during extraction.
+   */
+  public static final int FLAG_EMIT_RAW_SUBTITLE_DATA = 1 << 1; // 2
+
   private static final String TAG = "MatroskaExtractor";
 
   private static final int UNSET_ENTRY_ID = -1;
@@ -397,6 +416,8 @@ public class MatroskaExtractor implements Extractor {
   private final VarintReader varintReader;
   private final SparseArray<Track> tracks;
   private final boolean seekForCuesEnabled;
+  private final boolean parseSubtitlesDuringExtraction;
+  private final SubtitleParser.Factory subtitleParserFactory;
 
   // Temporary arrays.
   private final ParsableByteArray nalStartCode;
@@ -467,18 +488,53 @@ public class MatroskaExtractor implements Extractor {
   // Extractor outputs.
   private @MonotonicNonNull ExtractorOutput extractorOutput;
 
+  /**
+   * @deprecated Use {@link #MatroskaExtractor(SubtitleParser.Factory)} instead.
+   */
+  @Deprecated
   public MatroskaExtractor() {
-    this(0);
+    this(new DefaultEbmlReader(), FLAG_EMIT_RAW_SUBTITLE_DATA, SubtitleParser.Factory.UNSUPPORTED);
   }
 
+  /**
+   * @deprecated Use {@link #MatroskaExtractor(SubtitleParser.Factory, int)} instead.
+   */
+  @Deprecated
   public MatroskaExtractor(@Flags int flags) {
-    this(new DefaultEbmlReader(), flags);
+    this(
+        new DefaultEbmlReader(),
+        flags | FLAG_EMIT_RAW_SUBTITLE_DATA,
+        SubtitleParser.Factory.UNSUPPORTED);
   }
 
-  /* package */ MatroskaExtractor(EbmlReader reader, @Flags int flags) {
+  /**
+   * Constructs an instance.
+   *
+   * @param subtitleParserFactory The {@link SubtitleParser.Factory} for parsing subtitles during
+   *     extraction.
+   */
+  public MatroskaExtractor(SubtitleParser.Factory subtitleParserFactory) {
+    this(new DefaultEbmlReader(), /* flags= */ 0, subtitleParserFactory);
+  }
+
+  /**
+   * Constructs an instance.
+   *
+   * @param subtitleParserFactory The {@link SubtitleParser.Factory} for parsing subtitles during
+   *     extraction.
+   * @param flags Flags that control the extractor's behavior.
+   */
+  public MatroskaExtractor(SubtitleParser.Factory subtitleParserFactory, @Flags int flags) {
+    this(new DefaultEbmlReader(), flags, subtitleParserFactory);
+  }
+
+  /* package */ MatroskaExtractor(
+      EbmlReader reader, @Flags int flags, SubtitleParser.Factory subtitleParserFactory) {
     this.reader = reader;
     this.reader.init(new InnerEbmlProcessor());
+    this.subtitleParserFactory = subtitleParserFactory;
     seekForCuesEnabled = (flags & FLAG_DISABLE_SEEK_FOR_CUES) == 0;
+    parseSubtitlesDuringExtraction = (flags & FLAG_EMIT_RAW_SUBTITLE_DATA) == 0;
     varintReader = new VarintReader();
     tracks = new SparseArray<>();
     scratch = new ParsableByteArray(4);
@@ -502,6 +558,10 @@ public class MatroskaExtractor implements Extractor {
   @Override
   public final void init(ExtractorOutput output) {
     extractorOutput = output;
+    extractorOutput =
+        parseSubtitlesDuringExtraction
+            ? new SubtitleTranscodingExtractorOutput(output, subtitleParserFactory)
+            : output;
   }
 
   @CallSuper

libraries/extractor/src/test/java/androidx/media3/extractor/DefaultExtractorsFactoryTest.java

@@ -15,7 +15,6 @@
  */
 package androidx.media3.extractor;
 
-import static androidx.media3.common.util.Assertions.checkState;
 import static com.google.common.truth.Truth.assertThat;
 
 import android.net.Uri;
@@ -144,44 +143,6 @@ public final class DefaultExtractorsFactoryTest {
     }
   }
 
-  @Test
-  public void subtitleTranscoding_ifEnabled_wrapsExtractorsThatSupportMuxedSubtitles() {
-    DefaultExtractorsFactory defaultExtractorsFactory =
-        new DefaultExtractorsFactory().setTextTrackTranscodingEnabled(true);
-
-    Extractor[] extractors = defaultExtractorsFactory.createExtractors();
-
-    Extractor aviExtractor = null;
-    Extractor matroskaExtractor = null;
-    Extractor mp4Extractor = null;
-    Extractor fragmentedMp4Extractor = null;
-    Extractor tsExtractor = null;
-
-    for (Extractor extractor : extractors) {
-      if (extractor.getUnderlyingImplementation() instanceof AviExtractor) {
-        checkState(aviExtractor == null);
-        aviExtractor = extractor;
-      } else if (extractor.getUnderlyingImplementation() instanceof MatroskaExtractor) {
-        checkState(matroskaExtractor == null);
-        matroskaExtractor = extractor;
-      } else if (extractor.getUnderlyingImplementation() instanceof Mp4Extractor) {
-        checkState(mp4Extractor == null);
-        mp4Extractor = extractor;
-      } else if (extractor.getUnderlyingImplementation() instanceof FragmentedMp4Extractor) {
-        checkState(fragmentedMp4Extractor == null);
-        fragmentedMp4Extractor = extractor;
-      } else if (extractor.getUnderlyingImplementation() instanceof TsExtractor) {
-        checkState(tsExtractor == null);
-        tsExtractor = extractor;
-      }
-    }
-    assertThat(aviExtractor).isNotInstanceOf(SubtitleTranscodingExtractor.class);
-    assertThat(matroskaExtractor).isInstanceOf(SubtitleTranscodingExtractor.class);
-    assertThat(mp4Extractor).isNotInstanceOf(SubtitleTranscodingExtractor.class);
-    assertThat(fragmentedMp4Extractor).isNotInstanceOf(SubtitleTranscodingExtractor.class);
-    assertThat(tsExtractor).isNotInstanceOf(SubtitleTranscodingExtractor.class);
-  }
-
   private static List<Class<? extends Extractor>> getUnderlyingExtractorClasses(
       Extractor[] extractors) {
     List<Class<? extends Extractor>> extractorClasses = new ArrayList<>();

libraries/extractor/src/test/java/androidx/media3/extractor/mkv/MatroskaExtractorTest.java

@@ -15,8 +15,14 @@
  */
 package androidx.media3.extractor.mkv;
 
+import static androidx.media3.extractor.mp4.FragmentedMp4Extractor.FLAG_EMIT_RAW_SUBTITLE_DATA;
+
+import androidx.media3.extractor.text.DefaultSubtitleParserFactory;
+import androidx.media3.extractor.text.SubtitleParser;
 import androidx.media3.test.utils.ExtractorAsserts;
-import com.google.common.collect.ImmutableList;
+import com.google.common.base.Joiner;
+import java.util.ArrayList;
+import java.util.List;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.robolectric.ParameterizedRobolectricTestRunner;
@@ -27,90 +33,133 @@ import org.robolectric.ParameterizedRobolectricTestRunner.Parameters;
 @RunWith(ParameterizedRobolectricTestRunner.class)
 public final class MatroskaExtractorTest {
 
-  @Parameters(name = "{0}")
+  @Parameters(name = "{0},subtitlesParsedDuringExtraction={1}")
-  public static ImmutableList<ExtractorAsserts.SimulationConfig> params() {
+  public static List<Object[]> params() {
-    return ExtractorAsserts.configs();
+    List<Object[]> parameterList = new ArrayList<>();
+    for (ExtractorAsserts.SimulationConfig config : ExtractorAsserts.configs()) {
+      parameterList.add(new Object[] {config, /* subtitlesParsedDuringExtraction */ true});
+      parameterList.add(new Object[] {config, /* subtitlesParsedDuringExtraction */ false});
+    }
+    return parameterList;
   }
 
-  @Parameter public ExtractorAsserts.SimulationConfig simulationConfig;
+  @Parameter(0)
+  public ExtractorAsserts.SimulationConfig simulationConfig;
+
+  @Parameter(1)
+  public boolean subtitlesParsedDuringExtraction;
 
   @Test
   public void mkvSample() throws Exception {
     ExtractorAsserts.assertBehavior(
-        MatroskaExtractor::new, "media/mkv/sample.mkv", simulationConfig);
+        getExtractorFactory(subtitlesParsedDuringExtraction),
+        "media/mkv/sample.mkv",
+        simulationConfig);
   }
 
   @Test
   public void mkvSample_withSubripSubtitles() throws Exception {
     ExtractorAsserts.assertBehavior(
-        MatroskaExtractor::new, "media/mkv/sample_with_srt.mkv", simulationConfig);
+        getExtractorFactory(subtitlesParsedDuringExtraction),
+        "media/mkv/sample_with_srt.mkv",
+        getAssertionConfigWithPrefix(
+            "media/mkv/sample_with_srt.mkv", subtitlesParsedDuringExtraction),
+        simulationConfig);
   }
 
   @Test
   public void mkvSample_withNullTerminatedSubripSubtitles() throws Exception {
     ExtractorAsserts.assertBehavior(
-        MatroskaExtractor::new, "media/mkv/sample_with_null_terminated_srt.mkv", simulationConfig);
+        getExtractorFactory(subtitlesParsedDuringExtraction),
+        "media/mkv/sample_with_null_terminated_srt.mkv",
+        getAssertionConfigWithPrefix(
+            "media/mkv/sample_with_null_terminated_srt.mkv", subtitlesParsedDuringExtraction),
+        simulationConfig);
   }
 
   @Test
   public void mkvSample_withOverlappingSubripSubtitles() throws Exception {
     ExtractorAsserts.assertBehavior(
-        MatroskaExtractor::new, "media/mkv/sample_with_overlapping_srt.mkv", simulationConfig);
+        getExtractorFactory(subtitlesParsedDuringExtraction),
+        "media/mkv/sample_with_overlapping_srt.mkv",
+        getAssertionConfigWithPrefix(
+            "media/mkv/sample_with_overlapping_srt.mkv", subtitlesParsedDuringExtraction),
+        simulationConfig);
   }
 
   @Test
   public void mkvSample_withSsaSubtitles() throws Exception {
     ExtractorAsserts.assertBehavior(
-        MatroskaExtractor::new, "media/mkv/sample_with_ssa_subtitles.mkv", simulationConfig);
+        getExtractorFactory(subtitlesParsedDuringExtraction),
+        "media/mkv/sample_with_ssa_subtitles.mkv",
+        getAssertionConfigWithPrefix(
+            "media/mkv/sample_with_ssa_subtitles.mkv", subtitlesParsedDuringExtraction),
+        simulationConfig);
   }
 
   // https://github.com/google/ExoPlayer/pull/8265
   @Test
   public void mkvSample_withNullTerminatedSsaSubtitles() throws Exception {
     ExtractorAsserts.assertBehavior(
-        MatroskaExtractor::new,
+        getExtractorFactory(subtitlesParsedDuringExtraction),
         "media/mkv/sample_with_null_terminated_ssa_subtitles.mkv",
+        getAssertionConfigWithPrefix(
+            "media/mkv/sample_with_null_terminated_ssa_subtitles.mkv",
+            subtitlesParsedDuringExtraction),
         simulationConfig);
   }
 
   @Test
   public void mkvSample_withOverlappingSsaSubtitles() throws Exception {
     ExtractorAsserts.assertBehavior(
-        MatroskaExtractor::new,
+        getExtractorFactory(subtitlesParsedDuringExtraction),
         "media/mkv/sample_with_overlapping_ssa_subtitles.mkv",
+        getAssertionConfigWithPrefix(
+            "media/mkv/sample_with_overlapping_ssa_subtitles.mkv", subtitlesParsedDuringExtraction),
         simulationConfig);
   }
 
   @Test
   public void mkvSample_withVttSubtitles() throws Exception {
     ExtractorAsserts.assertBehavior(
-        MatroskaExtractor::new, "media/mkv/sample_with_vtt_subtitles.mkv", simulationConfig);
+        getExtractorFactory(subtitlesParsedDuringExtraction),
+        "media/mkv/sample_with_vtt_subtitles.mkv",
+        getAssertionConfigWithPrefix(
+            "media/mkv/sample_with_vtt_subtitles.mkv", subtitlesParsedDuringExtraction),
+        simulationConfig);
   }
 
   @Test
   public void mkvSample_withNullTerminatedVttSubtitles() throws Exception {
     ExtractorAsserts.assertBehavior(
-        MatroskaExtractor::new,
+        getExtractorFactory(subtitlesParsedDuringExtraction),
         "media/mkv/sample_with_null_terminated_vtt_subtitles.mkv",
+        getAssertionConfigWithPrefix(
+            "media/mkv/sample_with_null_terminated_vtt_subtitles.mkv",
+            subtitlesParsedDuringExtraction),
         simulationConfig);
   }
 
   @Test
   public void mkvSample_withVorbisAudio() throws Exception {
     ExtractorAsserts.assertBehavior(
-        MatroskaExtractor::new, "media/mkv/sample_with_vorbis_audio.mkv", simulationConfig);
+        getExtractorFactory(subtitlesParsedDuringExtraction),
+        "media/mkv/sample_with_vorbis_audio.mkv",
+        simulationConfig);
   }
 
   @Test
   public void mkvSample_withOpusAudio() throws Exception {
     ExtractorAsserts.assertBehavior(
-        MatroskaExtractor::new, "media/mkv/sample_with_opus_audio.mkv", simulationConfig);
+        getExtractorFactory(subtitlesParsedDuringExtraction),
+        "media/mkv/sample_with_opus_audio.mkv",
+        simulationConfig);
   }
 
   @Test
   public void mkvSample_withHtcRotationInfoInTrackName() throws Exception {
     ExtractorAsserts.assertBehavior(
-        MatroskaExtractor::new,
+        getExtractorFactory(subtitlesParsedDuringExtraction),
         "media/mkv/sample_with_htc_rotation_track_name.mkv",
         simulationConfig);
   }
@@ -118,18 +167,52 @@ public final class MatroskaExtractorTest {
   @Test
   public void mkvFullBlocksSample() throws Exception {
     ExtractorAsserts.assertBehavior(
-        MatroskaExtractor::new, "media/mkv/full_blocks.mkv", simulationConfig);
+        getExtractorFactory(subtitlesParsedDuringExtraction),
+        "media/mkv/full_blocks.mkv",
+        getAssertionConfigWithPrefix("media/mkv/full_blocks.mkv", subtitlesParsedDuringExtraction),
+        simulationConfig);
   }
 
   @Test
   public void webmSubsampleEncryption() throws Exception {
     ExtractorAsserts.assertBehavior(
-        MatroskaExtractor::new, "media/mkv/subsample_encrypted_noaltref.webm", simulationConfig);
+        getExtractorFactory(subtitlesParsedDuringExtraction),
+        "media/mkv/subsample_encrypted_noaltref.webm",
+        simulationConfig);
   }
 
   @Test
   public void webmSubsampleEncryptionWithAltrefFrames() throws Exception {
     ExtractorAsserts.assertBehavior(
-        MatroskaExtractor::new, "media/mkv/subsample_encrypted_altref.webm", simulationConfig);
+        getExtractorFactory(subtitlesParsedDuringExtraction),
+        "media/mkv/subsample_encrypted_altref.webm",
+        simulationConfig);
+  }
+
+  private static ExtractorAsserts.ExtractorFactory getExtractorFactory(
+      boolean subtitlesParsedDuringExtraction) {
+    SubtitleParser.Factory subtitleParserFactory;
+    @MatroskaExtractor.Flags int flags;
+    if (subtitlesParsedDuringExtraction) {
+      subtitleParserFactory = new DefaultSubtitleParserFactory();
+      flags = 0;
+    } else {
+      subtitleParserFactory = SubtitleParser.Factory.UNSUPPORTED;
+      flags = FLAG_EMIT_RAW_SUBTITLE_DATA;
+    }
+
+    return () -> new MatroskaExtractor(subtitleParserFactory, flags);
+  }
+
+  private ExtractorAsserts.AssertionConfig getAssertionConfigWithPrefix(
+      String filename, boolean subtitlesParsedDuringExtraction) {
+    String[] path = filename.split("/");
+    path[0] = "extractordumps";
+    String defaultExtractorDumps = Joiner.on('/').join(path);
+    path[1] = "mkv_subtitle_transcoding";
+    String subtitledExtractorDumps = Joiner.on('/').join(path);
+    String prefix =
+        subtitlesParsedDuringExtraction ? subtitledExtractorDumps : defaultExtractorDumps;
+    return new ExtractorAsserts.AssertionConfig.Builder().setDumpFilesPrefix(prefix).build();
   }
 }

libraries/extractor/src/test/java/androidx/media3/extractor/text/SubtitleTranscodingExtractorParameterizedTest.java

@@ -1,91 +0,0 @@
-/*
- * Copyright 2023 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package androidx.media3.extractor.text;
-
-import androidx.media3.extractor.Extractor;
-import androidx.media3.extractor.mkv.MatroskaExtractor;
-import androidx.media3.test.utils.ExtractorAsserts;
-import com.google.common.collect.ImmutableList;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.robolectric.ParameterizedRobolectricTestRunner;
-
-/**
- * Parameterized tests for {@link SubtitleTranscodingExtractor}.
- *
- * <p>Non-parameterized tests are in {@link SubtitleTranscodingExtractorTest}.
- */
-@RunWith(ParameterizedRobolectricTestRunner.class)
-public class SubtitleTranscodingExtractorParameterizedTest {
-
-  @ParameterizedRobolectricTestRunner.Parameters(name = "{0}")
-  public static ImmutableList<ExtractorAsserts.SimulationConfig> params() {
-    return ExtractorAsserts.configs();
-  }
-
-  @ParameterizedRobolectricTestRunner.Parameter
-  public ExtractorAsserts.SimulationConfig simulationConfig;
-
-  @Test
-  public void sampleWithSrtInMkv() throws Exception {
-    ExtractorAsserts.assertBehavior(
-        () -> createWrappedMatroskaExtractor(),
-        "media/mkv/sample_with_srt.mkv",
-        new ExtractorAsserts.AssertionConfig.Builder()
-            .setDumpFilesPrefix("extractordumps/subtitle_transcoding/srt_in_mkv")
-            .build(),
-        simulationConfig);
-  }
-
-  @Test
-  public void sampleWithOverlappingSrtInMkv() throws Exception {
-    ExtractorAsserts.assertBehavior(
-        () -> createWrappedMatroskaExtractor(),
-        "media/mkv/sample_with_overlapping_srt.mkv",
-        new ExtractorAsserts.AssertionConfig.Builder()
-            .setDumpFilesPrefix("extractordumps/subtitle_transcoding/overlapping_srt_in_mkv")
-            .build(),
-        simulationConfig);
-  }
-
-  @Test
-  public void sampleWithSsaInMkv() throws Exception {
-    ExtractorAsserts.assertBehavior(
-        () -> createWrappedMatroskaExtractor(),
-        "media/mkv/sample_with_ssa_subtitles.mkv",
-        new ExtractorAsserts.AssertionConfig.Builder()
-            .setDumpFilesPrefix("extractordumps/subtitle_transcoding/ssa_in_mkv")
-            .build(),
-        simulationConfig);
-  }
-
-  @Test
-  public void sampleWithOverlappingSsaInMkv() throws Exception {
-    ExtractorAsserts.assertBehavior(
-        () -> createWrappedMatroskaExtractor(),
-        "media/mkv/sample_with_overlapping_ssa_subtitles.mkv",
-        new ExtractorAsserts.AssertionConfig.Builder()
-            .setDumpFilesPrefix("extractordumps/subtitle_transcoding/overlapping_ssa_in_mkv")
-            .build(),
-        simulationConfig);
-  }
-
-  private static Extractor createWrappedMatroskaExtractor() {
-    return new SubtitleTranscodingExtractor(
-        new MatroskaExtractor(), new DefaultSubtitleParserFactory());
-  }
-}

libraries/extractor/src/test/java/androidx/media3/extractor/text/SubtitleTranscodingExtractorTest.java

@@ -1,44 +0,0 @@
-/*
- * Copyright 2023 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package androidx.media3.extractor.text;
-
-import static com.google.common.truth.Truth.assertThat;
-
-import androidx.media3.extractor.Extractor;
-import androidx.media3.extractor.mkv.MatroskaExtractor;
-import androidx.test.ext.junit.runners.AndroidJUnit4;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-/**
- * Non-parameterized tests for {@link SubtitleTranscodingExtractor}.
- *
- * <p>Parameterized tests are in {@link SubtitleTranscodingExtractorParameterizedTest}.
- */
-@RunWith(AndroidJUnit4.class)
-public class SubtitleTranscodingExtractorTest {
-
-  @Test
-  public void underlyingImplementationReturnsDelegate() {
-    Extractor matroskaExtractor = new MatroskaExtractor();
-    Extractor subtitleTranscodingExtractor =
-        new SubtitleTranscodingExtractor(matroskaExtractor, new DefaultSubtitleParserFactory());
-
-    assertThat(subtitleTranscodingExtractor.getUnderlyingImplementation())
-        .isSameInstanceAs(matroskaExtractor);
-  }
-}

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/full_blocks.mkv.0.dump

@@ -0,0 +1,30 @@
+seekMap:
+  isSeekable = true
+  duration = 8901000
+  getPosition(0) = [[timeUs=0, position=5401]]
+  getPosition(1) = [[timeUs=0, position=5401], [timeUs=2345000, position=5401]]
+  getPosition(4450500) = [[timeUs=2345000, position=5401], [timeUs=4567000, position=5401]]
+  getPosition(8901000) = [[timeUs=4567000, position=5401]]
+numberOfTracks = 1
+track 1:
+  total output bytes = 2951
+  sample count = 3
+  format 0:
+    id = 1
+    sampleMimeType = application/x-media3-cues
+    codecs = application/x-subrip
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 972, hash 8E8A2E4B
+  sample 1:
+    time = 2345000
+    flags = 1
+    data = length 1007, hash 87030429
+  sample 2:
+    time = 4567000
+    flags = 1
+    data = length 972, hash C2C47517
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/full_blocks.mkv.1.dump

@@ -0,0 +1,30 @@
+seekMap:
+  isSeekable = true
+  duration = 8901000
+  getPosition(0) = [[timeUs=0, position=5401]]
+  getPosition(1) = [[timeUs=0, position=5401], [timeUs=2345000, position=5401]]
+  getPosition(4450500) = [[timeUs=2345000, position=5401], [timeUs=4567000, position=5401]]
+  getPosition(8901000) = [[timeUs=4567000, position=5401]]
+numberOfTracks = 1
+track 1:
+  total output bytes = 2951
+  sample count = 3
+  format 0:
+    id = 1
+    sampleMimeType = application/x-media3-cues
+    codecs = application/x-subrip
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 972, hash 8E8A2E4B
+  sample 1:
+    time = 2345000
+    flags = 1
+    data = length 1007, hash 87030429
+  sample 2:
+    time = 4567000
+    flags = 1
+    data = length 972, hash C2C47517
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/full_blocks.mkv.2.dump

@@ -0,0 +1,30 @@
+seekMap:
+  isSeekable = true
+  duration = 8901000
+  getPosition(0) = [[timeUs=0, position=5401]]
+  getPosition(1) = [[timeUs=0, position=5401], [timeUs=2345000, position=5401]]
+  getPosition(4450500) = [[timeUs=2345000, position=5401], [timeUs=4567000, position=5401]]
+  getPosition(8901000) = [[timeUs=4567000, position=5401]]
+numberOfTracks = 1
+track 1:
+  total output bytes = 2951
+  sample count = 3
+  format 0:
+    id = 1
+    sampleMimeType = application/x-media3-cues
+    codecs = application/x-subrip
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 972, hash 8E8A2E4B
+  sample 1:
+    time = 2345000
+    flags = 1
+    data = length 1007, hash 87030429
+  sample 2:
+    time = 4567000
+    flags = 1
+    data = length 972, hash C2C47517
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/full_blocks.mkv.3.dump

@@ -0,0 +1,30 @@
+seekMap:
+  isSeekable = true
+  duration = 8901000
+  getPosition(0) = [[timeUs=0, position=5401]]
+  getPosition(1) = [[timeUs=0, position=5401], [timeUs=2345000, position=5401]]
+  getPosition(4450500) = [[timeUs=2345000, position=5401], [timeUs=4567000, position=5401]]
+  getPosition(8901000) = [[timeUs=4567000, position=5401]]
+numberOfTracks = 1
+track 1:
+  total output bytes = 2951
+  sample count = 3
+  format 0:
+    id = 1
+    sampleMimeType = application/x-media3-cues
+    codecs = application/x-subrip
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 972, hash 8E8A2E4B
+  sample 1:
+    time = 2345000
+    flags = 1
+    data = length 1007, hash 87030429
+  sample 2:
+    time = 4567000
+    flags = 1
+    data = length 972, hash C2C47517
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/full_blocks.mkv.unknown_length.dump

@@ -0,0 +1,30 @@
+seekMap:
+  isSeekable = true
+  duration = 8901000
+  getPosition(0) = [[timeUs=0, position=5401]]
+  getPosition(1) = [[timeUs=0, position=5401], [timeUs=2345000, position=5401]]
+  getPosition(4450500) = [[timeUs=2345000, position=5401], [timeUs=4567000, position=5401]]
+  getPosition(8901000) = [[timeUs=4567000, position=5401]]
+numberOfTracks = 1
+track 1:
+  total output bytes = 2951
+  sample count = 3
+  format 0:
+    id = 1
+    sampleMimeType = application/x-media3-cues
+    codecs = application/x-subrip
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 972, hash 8E8A2E4B
+  sample 1:
+    time = 2345000
+    flags = 1
+    data = length 1007, hash 87030429
+  sample 2:
+    time = 4567000
+    flags = 1
+    data = length 972, hash C2C47517
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_null_terminated_srt.mkv.0.dump

@@ -0,0 +1,283 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=1163]]
+  getPosition(1) = [[timeUs=0, position=1163]]
+  getPosition(617000) = [[timeUs=0, position=1163]]
+  getPosition(1234000) = [[timeUs=0, position=1163]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 97000
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131000
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166000
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201000
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236000
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270000
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 306000
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 376000
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410000
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445000
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480000
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 514000
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 550000
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 585000
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654000
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 690000
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724000
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759000
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 793000
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 829000
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 864000
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932000
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 968000
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002000
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037000
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 962
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = application/x-subrip
+    selectionFlags = [default]
+    language = en
+    label = Subs Label
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 962, hash 6D7C55B3
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_null_terminated_srt.mkv.1.dump

@@ -0,0 +1,283 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=1163]]
+  getPosition(1) = [[timeUs=0, position=1163]]
+  getPosition(617000) = [[timeUs=0, position=1163]]
+  getPosition(1234000) = [[timeUs=0, position=1163]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 97000
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131000
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166000
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201000
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236000
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270000
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 306000
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 376000
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410000
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445000
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480000
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 514000
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 550000
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 585000
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654000
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 690000
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724000
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759000
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 793000
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 829000
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 864000
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932000
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 968000
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002000
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037000
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 962
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = application/x-subrip
+    selectionFlags = [default]
+    language = en
+    label = Subs Label
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 962, hash 6D7C55B3
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_null_terminated_srt.mkv.2.dump

@@ -0,0 +1,283 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=1163]]
+  getPosition(1) = [[timeUs=0, position=1163]]
+  getPosition(617000) = [[timeUs=0, position=1163]]
+  getPosition(1234000) = [[timeUs=0, position=1163]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 97000
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131000
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166000
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201000
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236000
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270000
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 306000
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 376000
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410000
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445000
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480000
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 514000
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 550000
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 585000
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654000
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 690000
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724000
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759000
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 793000
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 829000
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 864000
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932000
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 968000
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002000
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037000
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 962
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = application/x-subrip
+    selectionFlags = [default]
+    language = en
+    label = Subs Label
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 962, hash 6D7C55B3
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_null_terminated_srt.mkv.3.dump

@@ -0,0 +1,283 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=1163]]
+  getPosition(1) = [[timeUs=0, position=1163]]
+  getPosition(617000) = [[timeUs=0, position=1163]]
+  getPosition(1234000) = [[timeUs=0, position=1163]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 97000
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131000
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166000
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201000
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236000
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270000
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 306000
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 376000
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410000
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445000
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480000
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 514000
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 550000
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 585000
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654000
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 690000
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724000
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759000
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 793000
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 829000
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 864000
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932000
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 968000
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002000
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037000
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 962
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = application/x-subrip
+    selectionFlags = [default]
+    language = en
+    label = Subs Label
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 962, hash 6D7C55B3
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_null_terminated_srt.mkv.unknown_length.dump

@@ -0,0 +1,283 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=1163]]
+  getPosition(1) = [[timeUs=0, position=1163]]
+  getPosition(617000) = [[timeUs=0, position=1163]]
+  getPosition(1234000) = [[timeUs=0, position=1163]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 97000
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131000
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166000
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201000
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236000
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270000
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 306000
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 376000
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410000
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445000
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480000
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 514000
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 550000
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 585000
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654000
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 690000
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724000
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759000
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 793000
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 829000
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 864000
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932000
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 968000
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002000
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037000
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 962
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = application/x-subrip
+    selectionFlags = [default]
+    language = en
+    label = Subs Label
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 962, hash 6D7C55B3
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_null_terminated_ssa_subtitles.mkv.0.dump

@@ -0,0 +1,285 @@
+seekMap:
+  isSeekable = true
+  duration = 1139000
+  getPosition(0) = [[timeUs=0, position=6106]]
+  getPosition(1) = [[timeUs=0, position=6106], [timeUs=67000, position=6106]]
+  getPosition(569500) = [[timeUs=67000, position=6106]]
+  getPosition(1139000) = [[timeUs=67000, position=6106]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1249
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = text/x-ssa
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 90, hash A5E21974
+      data = length 470, hash 40E7D996
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1249, hash 6B21A04D
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_null_terminated_ssa_subtitles.mkv.1.dump

@@ -0,0 +1,285 @@
+seekMap:
+  isSeekable = true
+  duration = 1139000
+  getPosition(0) = [[timeUs=0, position=6106]]
+  getPosition(1) = [[timeUs=0, position=6106], [timeUs=67000, position=6106]]
+  getPosition(569500) = [[timeUs=67000, position=6106]]
+  getPosition(1139000) = [[timeUs=67000, position=6106]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1249
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = text/x-ssa
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 90, hash A5E21974
+      data = length 470, hash 40E7D996
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1249, hash 6B21A04D
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_null_terminated_ssa_subtitles.mkv.2.dump

@@ -0,0 +1,285 @@
+seekMap:
+  isSeekable = true
+  duration = 1139000
+  getPosition(0) = [[timeUs=0, position=6106]]
+  getPosition(1) = [[timeUs=0, position=6106], [timeUs=67000, position=6106]]
+  getPosition(569500) = [[timeUs=67000, position=6106]]
+  getPosition(1139000) = [[timeUs=67000, position=6106]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1249
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = text/x-ssa
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 90, hash A5E21974
+      data = length 470, hash 40E7D996
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1249, hash 6B21A04D
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_null_terminated_ssa_subtitles.mkv.3.dump

@@ -0,0 +1,285 @@
+seekMap:
+  isSeekable = true
+  duration = 1139000
+  getPosition(0) = [[timeUs=0, position=6106]]
+  getPosition(1) = [[timeUs=0, position=6106], [timeUs=67000, position=6106]]
+  getPosition(569500) = [[timeUs=67000, position=6106]]
+  getPosition(1139000) = [[timeUs=67000, position=6106]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1249
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = text/x-ssa
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 90, hash A5E21974
+      data = length 470, hash 40E7D996
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1249, hash 6B21A04D
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_null_terminated_ssa_subtitles.mkv.unknown_length.dump

@@ -0,0 +1,285 @@
+seekMap:
+  isSeekable = true
+  duration = 1139000
+  getPosition(0) = [[timeUs=0, position=6106]]
+  getPosition(1) = [[timeUs=0, position=6106], [timeUs=67000, position=6106]]
+  getPosition(569500) = [[timeUs=67000, position=6106]]
+  getPosition(1139000) = [[timeUs=67000, position=6106]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 67000
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 134000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 100000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 267000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 200000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 167000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 234000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 400000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 334000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 300000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 367000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 500000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 467000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 434000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 634000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 567000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 534000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 600000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 767000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 700000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 667000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 734000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 900000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 834000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 800000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 867000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 1034000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 967000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 934000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 1000000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 129000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 163829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 198659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 233489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 268319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 303149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 337979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 372809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 408000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 442829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 477659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 512489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 547319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 582149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 616979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 651809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 687000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 721829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 756659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 791489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 826319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 861149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 895979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 930809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 965000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 999829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 1034659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1069489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1104319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1249
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = text/x-ssa
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 90, hash A5E21974
+      data = length 470, hash 40E7D996
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1249, hash 6B21A04D
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_null_terminated_vtt_subtitles.mkv.0.dump

@@ -0,0 +1,282 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=5661]]
+  getPosition(1) = [[timeUs=0, position=5661]]
+  getPosition(617000) = [[timeUs=0, position=5661]]
+  getPosition(1234000) = [[timeUs=0, position=5661]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 96829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 305809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 375829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 515149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 549979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 584809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 689659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 794149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 828979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 863809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 967659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1129
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = text/vtt
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1129, hash 7CA6A835
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_null_terminated_vtt_subtitles.mkv.1.dump

@@ -0,0 +1,282 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=5661]]
+  getPosition(1) = [[timeUs=0, position=5661]]
+  getPosition(617000) = [[timeUs=0, position=5661]]
+  getPosition(1234000) = [[timeUs=0, position=5661]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 96829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 305809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 375829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 515149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 549979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 584809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 689659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 794149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 828979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 863809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 967659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1129
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = text/vtt
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1129, hash 7CA6A835
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_null_terminated_vtt_subtitles.mkv.2.dump

@@ -0,0 +1,282 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=5661]]
+  getPosition(1) = [[timeUs=0, position=5661]]
+  getPosition(617000) = [[timeUs=0, position=5661]]
+  getPosition(1234000) = [[timeUs=0, position=5661]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 96829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 305809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 375829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 515149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 549979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 584809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 689659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 794149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 828979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 863809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 967659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1129
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = text/vtt
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1129, hash 7CA6A835
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_null_terminated_vtt_subtitles.mkv.3.dump

@@ -0,0 +1,282 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=5661]]
+  getPosition(1) = [[timeUs=0, position=5661]]
+  getPosition(617000) = [[timeUs=0, position=5661]]
+  getPosition(1234000) = [[timeUs=0, position=5661]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 96829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 305809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 375829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 515149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 549979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 584809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 689659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 794149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 828979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 863809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 967659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1129
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = text/vtt
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1129, hash 7CA6A835
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_null_terminated_vtt_subtitles.mkv.unknown_length.dump

@@ -0,0 +1,282 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=5661]]
+  getPosition(1) = [[timeUs=0, position=5661]]
+  getPosition(617000) = [[timeUs=0, position=5661]]
+  getPosition(1234000) = [[timeUs=0, position=5661]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 96829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 305809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 375829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 515149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 549979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 584809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 689659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 794149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 828979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 863809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 967659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1129
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = text/vtt
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1129, hash 7CA6A835
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_vtt_subtitles.mkv.0.dump

@@ -0,0 +1,282 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=5661]]
+  getPosition(1) = [[timeUs=0, position=5661]]
+  getPosition(617000) = [[timeUs=0, position=5661]]
+  getPosition(1234000) = [[timeUs=0, position=5661]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 96829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 305809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 375829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 515149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 549979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 584809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 689659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 794149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 828979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 863809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 967659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1139
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = text/vtt
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1139, hash 156F6F9D
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_vtt_subtitles.mkv.1.dump

@@ -0,0 +1,282 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=5661]]
+  getPosition(1) = [[timeUs=0, position=5661]]
+  getPosition(617000) = [[timeUs=0, position=5661]]
+  getPosition(1234000) = [[timeUs=0, position=5661]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 96829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 305809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 375829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 515149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 549979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 584809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 689659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 794149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 828979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 863809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 967659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1139
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = text/vtt
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1139, hash 156F6F9D
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_vtt_subtitles.mkv.2.dump

@@ -0,0 +1,282 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=5661]]
+  getPosition(1) = [[timeUs=0, position=5661]]
+  getPosition(617000) = [[timeUs=0, position=5661]]
+  getPosition(1234000) = [[timeUs=0, position=5661]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 96829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 305809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 375829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 515149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 549979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 584809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 689659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 794149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 828979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 863809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 967659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1139
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = text/vtt
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1139, hash 156F6F9D
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_vtt_subtitles.mkv.3.dump

@@ -0,0 +1,282 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=5661]]
+  getPosition(1) = [[timeUs=0, position=5661]]
+  getPosition(617000) = [[timeUs=0, position=5661]]
+  getPosition(1234000) = [[timeUs=0, position=5661]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 96829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 305809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 375829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 515149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 549979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 584809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 689659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 794149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 828979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 863809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 967659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1139
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = text/vtt
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1139, hash 156F6F9D
+tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/mkv_subtitle_transcoding/sample_with_vtt_subtitles.mkv.unknown_length.dump

@@ -0,0 +1,282 @@
+seekMap:
+  isSeekable = true
+  duration = 1234000
+  getPosition(0) = [[timeUs=0, position=5661]]
+  getPosition(1) = [[timeUs=0, position=5661]]
+  getPosition(617000) = [[timeUs=0, position=5661]]
+  getPosition(1234000) = [[timeUs=0, position=5661]]
+numberOfTracks = 3
+track 1:
+  total output bytes = 89502
+  sample count = 30
+  format 0:
+    id = 1
+    sampleMimeType = video/avc
+    codecs = avc1.640034
+    width = 1080
+    height = 720
+    selectionFlags = [default]
+    language = und
+    initializationData:
+      data = length 30, hash F6F3D010
+      data = length 10, hash 7A0D0F2B
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 36477, hash F0F36CFE
+  sample 1:
+    time = 67000
+    flags = 0
+    data = length 5341, hash 40B85E2
+  sample 2:
+    time = 33000
+    flags = 0
+    data = length 596, hash 357B4D92
+  sample 3:
+    time = 200000
+    flags = 0
+    data = length 7704, hash A39EDA06
+  sample 4:
+    time = 133000
+    flags = 0
+    data = length 989, hash 2813C72D
+  sample 5:
+    time = 100000
+    flags = 0
+    data = length 721, hash C50D1C73
+  sample 6:
+    time = 167000
+    flags = 0
+    data = length 519, hash 65FE1911
+  sample 7:
+    time = 333000
+    flags = 0
+    data = length 6160, hash E1CAC0EC
+  sample 8:
+    time = 267000
+    flags = 0
+    data = length 953, hash 7160C661
+  sample 9:
+    time = 233000
+    flags = 0
+    data = length 620, hash 7A7AE07C
+  sample 10:
+    time = 300000
+    flags = 0
+    data = length 405, hash 5CC7F4E7
+  sample 11:
+    time = 433000
+    flags = 0
+    data = length 4852, hash 9DB6979D
+  sample 12:
+    time = 400000
+    flags = 0
+    data = length 547, hash E31A6979
+  sample 13:
+    time = 367000
+    flags = 0
+    data = length 570, hash FEC40D00
+  sample 14:
+    time = 567000
+    flags = 0
+    data = length 5525, hash 7C478F7E
+  sample 15:
+    time = 500000
+    flags = 0
+    data = length 1082, hash DA07059A
+  sample 16:
+    time = 467000
+    flags = 0
+    data = length 807, hash 93478E6B
+  sample 17:
+    time = 533000
+    flags = 0
+    data = length 744, hash 9A8E6026
+  sample 18:
+    time = 700000
+    flags = 0
+    data = length 4732, hash C73B23C0
+  sample 19:
+    time = 633000
+    flags = 0
+    data = length 1004, hash 8A19A228
+  sample 20:
+    time = 600000
+    flags = 0
+    data = length 794, hash 8126022C
+  sample 21:
+    time = 667000
+    flags = 0
+    data = length 645, hash F08300E5
+  sample 22:
+    time = 833000
+    flags = 0
+    data = length 2684, hash 727FE378
+  sample 23:
+    time = 767000
+    flags = 0
+    data = length 787, hash 419A7821
+  sample 24:
+    time = 733000
+    flags = 0
+    data = length 649, hash 5C159346
+  sample 25:
+    time = 800000
+    flags = 0
+    data = length 509, hash F912D655
+  sample 26:
+    time = 967000
+    flags = 0
+    data = length 1226, hash 29815C21
+  sample 27:
+    time = 900000
+    flags = 0
+    data = length 898, hash D997AD0A
+  sample 28:
+    time = 867000
+    flags = 0
+    data = length 476, hash A0423645
+  sample 29:
+    time = 933000
+    flags = 0
+    data = length 486, hash DDF32CBB
+track 2:
+  total output bytes = 12120
+  sample count = 29
+  format 0:
+    id = 2
+    sampleMimeType = audio/ac3
+    channelCount = 1
+    sampleRate = 44100
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 62000
+    flags = 1
+    data = length 416, hash 211F2286
+  sample 1:
+    time = 96829
+    flags = 1
+    data = length 418, hash 77425A86
+  sample 2:
+    time = 131659
+    flags = 1
+    data = length 418, hash A0FE5CA1
+  sample 3:
+    time = 166489
+    flags = 1
+    data = length 418, hash 2309B066
+  sample 4:
+    time = 201319
+    flags = 1
+    data = length 418, hash 928A653B
+  sample 5:
+    time = 236149
+    flags = 1
+    data = length 418, hash 3422F0CB
+  sample 6:
+    time = 270979
+    flags = 1
+    data = length 418, hash EFF43D5B
+  sample 7:
+    time = 305809
+    flags = 1
+    data = length 418, hash FC8093C7
+  sample 8:
+    time = 341000
+    flags = 1
+    data = length 418, hash CCC08A16
+  sample 9:
+    time = 375829
+    flags = 1
+    data = length 418, hash 2A6EE863
+  sample 10:
+    time = 410659
+    flags = 1
+    data = length 418, hash D69A9251
+  sample 11:
+    time = 445489
+    flags = 1
+    data = length 418, hash BCFB758D
+  sample 12:
+    time = 480319
+    flags = 1
+    data = length 418, hash 11B66799
+  sample 13:
+    time = 515149
+    flags = 1
+    data = length 418, hash C824D392
+  sample 14:
+    time = 549979
+    flags = 1
+    data = length 418, hash C167D872
+  sample 15:
+    time = 584809
+    flags = 1
+    data = length 418, hash 4221C855
+  sample 16:
+    time = 620000
+    flags = 1
+    data = length 418, hash 4D4FF934
+  sample 17:
+    time = 654829
+    flags = 1
+    data = length 418, hash 984AA025
+  sample 18:
+    time = 689659
+    flags = 1
+    data = length 418, hash BB788B46
+  sample 19:
+    time = 724489
+    flags = 1
+    data = length 418, hash 9EFBFD97
+  sample 20:
+    time = 759319
+    flags = 1
+    data = length 418, hash DF1A460C
+  sample 21:
+    time = 794149
+    flags = 1
+    data = length 418, hash 2BDB56A
+  sample 22:
+    time = 828979
+    flags = 1
+    data = length 418, hash CA230060
+  sample 23:
+    time = 863809
+    flags = 1
+    data = length 418, hash D2F19F41
+  sample 24:
+    time = 898000
+    flags = 1
+    data = length 418, hash AF392D79
+  sample 25:
+    time = 932829
+    flags = 1
+    data = length 418, hash C5D7F2A3
+  sample 26:
+    time = 967659
+    flags = 1
+    data = length 418, hash 733A35AE
+  sample 27:
+    time = 1002489
+    flags = 1
+    data = length 418, hash DE46E5D3
+  sample 28:
+    time = 1037319
+    flags = 1
+    data = length 418, hash 56AB8D37
+track 3:
+  total output bytes = 1139
+  sample count = 1
+  format 0:
+    id = 3
+    sampleMimeType = application/x-media3-cues
+    codecs = text/vtt
+    selectionFlags = [default]
+    language = und
+  sample 0:
+    time = 0
+    flags = 1
+    data = length 1139, hash 156F6F9D
+tracksEnded = true