diff --git a/libraries/container/src/main/java/androidx/media3/container/Mp4Box.java b/libraries/container/src/main/java/androidx/media3/container/Mp4Box.java
index 8f74cd6e3f..258724a26d 100644
--- a/libraries/container/src/main/java/androidx/media3/container/Mp4Box.java
+++ b/libraries/container/src/main/java/androidx/media3/container/Mp4Box.java
@@ -117,6 +117,9 @@ public abstract class Mp4Box {
   @SuppressWarnings("ConstantCaseForConstants")
   public static final int TYPE_dvvC = 0x64767643;
 
+  @SuppressWarnings("ConstantCaseForConstants")
+  public static final int TYPE_dvwC = 0x64767743;
+
   @SuppressWarnings("ConstantCaseForConstants")
   public static final int TYPE_s263 = 0x73323633;
 
diff --git a/libraries/extractor/src/main/java/androidx/media3/extractor/mp4/BoxParser.java b/libraries/extractor/src/main/java/androidx/media3/extractor/mp4/BoxParser.java
index d61b5fd8bf..dc5115a997 100644
--- a/libraries/extractor/src/main/java/androidx/media3/extractor/mp4/BoxParser.java
+++ b/libraries/extractor/src/main/java/androidx/media3/extractor/mp4/BoxParser.java
@@ -1367,7 +1367,24 @@ public final class BoxParser {
                     : C.STEREO_MODE_INTERLEAVED_LEFT_PRIMARY;
           }
         }
-      } else if (childAtomType == Mp4Box.TYPE_dvcC || childAtomType == Mp4Box.TYPE_dvvC) {
+      } else if (childAtomType == Mp4Box.TYPE_dvcC
+          || childAtomType == Mp4Box.TYPE_dvvC
+          || childAtomType == Mp4Box.TYPE_dvwC) {
+        int childAtomBodySize = childAtomSize - Mp4Box.HEADER_SIZE;
+        byte[] initializationDataChunk = new byte[childAtomBodySize];
+        parent.readBytes(initializationDataChunk, /* offset= */ 0, childAtomBodySize);
+        // Add the initialization data of Dolby Vision to the existing list of initialization data.
+        if (initializationData != null) {
+          initializationData =
+              ImmutableList.<byte[]>builder()
+                  .addAll(initializationData)
+                  .add(initializationDataChunk)
+                  .build();
+        } else {
+          ExtractorUtil.checkContainerInput(
+              false, "initializationData must already be set from hvcC or avcC atom");
+        }
+        parent.setPosition(childStartPosition + Mp4Box.HEADER_SIZE);
         @Nullable DolbyVisionConfig dolbyVisionConfig = DolbyVisionConfig.parse(parent);
         if (dolbyVisionConfig != null) {
           codecs = dolbyVisionConfig.codecs;
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.0.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.0.dump
index 9c9b20510e..01985d527c 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.0.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.0.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[Mp4Timestamp: creation time=3788952614, modification time=3788952614, timescale=600]
     initializationData:
       data = length 97, hash 32FB3D18
+      data = length 24, hash A31E9935
   sample 0:
     time = -455000
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.1.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.1.dump
index b16c3cf3a4..65197df72e 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.1.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.1.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[Mp4Timestamp: creation time=3788952614, modification time=3788952614, timescale=600]
     initializationData:
       data = length 97, hash 32FB3D18
+      data = length 24, hash A31E9935
   sample 0:
     time = 611666
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.2.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.2.dump
index 793e2d6276..cf72571bc1 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.2.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.2.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[Mp4Timestamp: creation time=3788952614, modification time=3788952614, timescale=600]
     initializationData:
       data = length 97, hash 32FB3D18
+      data = length 24, hash A31E9935
   sample 0:
     time = 1680000
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.3.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.3.dump
index 55dadc33bb..2f570620d4 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.3.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.3.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[Mp4Timestamp: creation time=3788952614, modification time=3788952614, timescale=600]
     initializationData:
       data = length 97, hash 32FB3D18
+      data = length 24, hash A31E9935
   sample 0:
     time = 1680000
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.0.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.0.dump
index 9c9b20510e..01985d527c 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.0.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.0.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[Mp4Timestamp: creation time=3788952614, modification time=3788952614, timescale=600]
     initializationData:
       data = length 97, hash 32FB3D18
+      data = length 24, hash A31E9935
   sample 0:
     time = -455000
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.1.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.1.dump
index b16c3cf3a4..65197df72e 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.1.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.1.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[Mp4Timestamp: creation time=3788952614, modification time=3788952614, timescale=600]
     initializationData:
       data = length 97, hash 32FB3D18
+      data = length 24, hash A31E9935
   sample 0:
     time = 611666
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.2.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.2.dump
index 793e2d6276..cf72571bc1 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.2.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.2.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[Mp4Timestamp: creation time=3788952614, modification time=3788952614, timescale=600]
     initializationData:
       data = length 97, hash 32FB3D18
+      data = length 24, hash A31E9935
   sample 0:
     time = 1680000
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.3.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.3.dump
index 55dadc33bb..2f570620d4 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.3.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.3.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[Mp4Timestamp: creation time=3788952614, modification time=3788952614, timescale=600]
     initializationData:
       data = length 97, hash 32FB3D18
+      data = length 24, hash A31E9935
   sample 0:
     time = 1680000
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.unknown_length.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.unknown_length.dump
index 9c9b20510e..01985d527c 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.unknown_length.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.reading_within_gop_sample_dependencies.unknown_length.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[Mp4Timestamp: creation time=3788952614, modification time=3788952614, timescale=600]
     initializationData:
       data = length 97, hash 32FB3D18
+      data = length 24, hash A31E9935
   sample 0:
     time = -455000
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.unknown_length.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.unknown_length.dump
index 9c9b20510e..01985d527c 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.unknown_length.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_edit_list.mp4.unknown_length.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[Mp4Timestamp: creation time=3788952614, modification time=3788952614, timescale=600]
     initializationData:
       data = length 97, hash 32FB3D18
+      data = length 24, hash A31E9935
   sample 0:
     time = -455000
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.0.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.0.dump
index a695c39076..0bcbe2570d 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.0.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.0.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[mdta: key=com.apple.quicktime.location.accuracy.horizontal, value=3.754789, mdta: key=com.apple.quicktime.location.ISO6709, value=+37.7450-122.4301+066.374/, mdta: key=com.apple.quicktime.make, value=Apple, mdta: key=com.apple.quicktime.model, value=iPhone 12 Pro Max, mdta: key=com.apple.quicktime.software, value=14.5.1, mdta: key=com.apple.quicktime.creationdate, value=2021-05-25T09:21:51-0700, Mp4Timestamp: creation time=3704804511, modification time=3704804511, timescale=600]
     initializationData:
       data = length 526, hash 7B3FC433
+      data = length 24, hash A31E9935
   sample 0:
     time = 0
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.1.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.1.dump
index 39bebf511b..432da43b65 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.1.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.1.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[mdta: key=com.apple.quicktime.location.accuracy.horizontal, value=3.754789, mdta: key=com.apple.quicktime.location.ISO6709, value=+37.7450-122.4301+066.374/, mdta: key=com.apple.quicktime.make, value=Apple, mdta: key=com.apple.quicktime.model, value=iPhone 12 Pro Max, mdta: key=com.apple.quicktime.software, value=14.5.1, mdta: key=com.apple.quicktime.creationdate, value=2021-05-25T09:21:51-0700, Mp4Timestamp: creation time=3704804511, modification time=3704804511, timescale=600]
     initializationData:
       data = length 526, hash 7B3FC433
+      data = length 24, hash A31E9935
   sample 0:
     time = 0
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.2.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.2.dump
index 8e5b00fc7a..12532a964e 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.2.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.2.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[mdta: key=com.apple.quicktime.location.accuracy.horizontal, value=3.754789, mdta: key=com.apple.quicktime.location.ISO6709, value=+37.7450-122.4301+066.374/, mdta: key=com.apple.quicktime.make, value=Apple, mdta: key=com.apple.quicktime.model, value=iPhone 12 Pro Max, mdta: key=com.apple.quicktime.software, value=14.5.1, mdta: key=com.apple.quicktime.creationdate, value=2021-05-25T09:21:51-0700, Mp4Timestamp: creation time=3704804511, modification time=3704804511, timescale=600]
     initializationData:
       data = length 526, hash 7B3FC433
+      data = length 24, hash A31E9935
   sample 0:
     time = 0
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.3.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.3.dump
index 0e1856105f..b36a856667 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.3.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.3.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[mdta: key=com.apple.quicktime.location.accuracy.horizontal, value=3.754789, mdta: key=com.apple.quicktime.location.ISO6709, value=+37.7450-122.4301+066.374/, mdta: key=com.apple.quicktime.make, value=Apple, mdta: key=com.apple.quicktime.model, value=iPhone 12 Pro Max, mdta: key=com.apple.quicktime.software, value=14.5.1, mdta: key=com.apple.quicktime.creationdate, value=2021-05-25T09:21:51-0700, Mp4Timestamp: creation time=3704804511, modification time=3704804511, timescale=600]
     initializationData:
       data = length 526, hash 7B3FC433
+      data = length 24, hash A31E9935
   sample 0:
     time = 0
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.0.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.0.dump
index a695c39076..0bcbe2570d 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.0.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.0.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[mdta: key=com.apple.quicktime.location.accuracy.horizontal, value=3.754789, mdta: key=com.apple.quicktime.location.ISO6709, value=+37.7450-122.4301+066.374/, mdta: key=com.apple.quicktime.make, value=Apple, mdta: key=com.apple.quicktime.model, value=iPhone 12 Pro Max, mdta: key=com.apple.quicktime.software, value=14.5.1, mdta: key=com.apple.quicktime.creationdate, value=2021-05-25T09:21:51-0700, Mp4Timestamp: creation time=3704804511, modification time=3704804511, timescale=600]
     initializationData:
       data = length 526, hash 7B3FC433
+      data = length 24, hash A31E9935
   sample 0:
     time = 0
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.1.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.1.dump
index 39bebf511b..432da43b65 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.1.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.1.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[mdta: key=com.apple.quicktime.location.accuracy.horizontal, value=3.754789, mdta: key=com.apple.quicktime.location.ISO6709, value=+37.7450-122.4301+066.374/, mdta: key=com.apple.quicktime.make, value=Apple, mdta: key=com.apple.quicktime.model, value=iPhone 12 Pro Max, mdta: key=com.apple.quicktime.software, value=14.5.1, mdta: key=com.apple.quicktime.creationdate, value=2021-05-25T09:21:51-0700, Mp4Timestamp: creation time=3704804511, modification time=3704804511, timescale=600]
     initializationData:
       data = length 526, hash 7B3FC433
+      data = length 24, hash A31E9935
   sample 0:
     time = 0
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.2.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.2.dump
index 8e5b00fc7a..12532a964e 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.2.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.2.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[mdta: key=com.apple.quicktime.location.accuracy.horizontal, value=3.754789, mdta: key=com.apple.quicktime.location.ISO6709, value=+37.7450-122.4301+066.374/, mdta: key=com.apple.quicktime.make, value=Apple, mdta: key=com.apple.quicktime.model, value=iPhone 12 Pro Max, mdta: key=com.apple.quicktime.software, value=14.5.1, mdta: key=com.apple.quicktime.creationdate, value=2021-05-25T09:21:51-0700, Mp4Timestamp: creation time=3704804511, modification time=3704804511, timescale=600]
     initializationData:
       data = length 526, hash 7B3FC433
+      data = length 24, hash A31E9935
   sample 0:
     time = 0
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.3.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.3.dump
index 0e1856105f..b36a856667 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.3.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.3.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[mdta: key=com.apple.quicktime.location.accuracy.horizontal, value=3.754789, mdta: key=com.apple.quicktime.location.ISO6709, value=+37.7450-122.4301+066.374/, mdta: key=com.apple.quicktime.make, value=Apple, mdta: key=com.apple.quicktime.model, value=iPhone 12 Pro Max, mdta: key=com.apple.quicktime.software, value=14.5.1, mdta: key=com.apple.quicktime.creationdate, value=2021-05-25T09:21:51-0700, Mp4Timestamp: creation time=3704804511, modification time=3704804511, timescale=600]
     initializationData:
       data = length 526, hash 7B3FC433
+      data = length 24, hash A31E9935
   sample 0:
     time = 0
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.unknown_length.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.unknown_length.dump
index a695c39076..0bcbe2570d 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.unknown_length.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.reading_within_gop_sample_dependencies.unknown_length.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[mdta: key=com.apple.quicktime.location.accuracy.horizontal, value=3.754789, mdta: key=com.apple.quicktime.location.ISO6709, value=+37.7450-122.4301+066.374/, mdta: key=com.apple.quicktime.make, value=Apple, mdta: key=com.apple.quicktime.model, value=iPhone 12 Pro Max, mdta: key=com.apple.quicktime.software, value=14.5.1, mdta: key=com.apple.quicktime.creationdate, value=2021-05-25T09:21:51-0700, Mp4Timestamp: creation time=3704804511, modification time=3704804511, timescale=600]
     initializationData:
       data = length 526, hash 7B3FC433
+      data = length 24, hash A31E9935
   sample 0:
     time = 0
     flags = 1
diff --git a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.unknown_length.dump b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.unknown_length.dump
index a695c39076..0bcbe2570d 100644
--- a/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.unknown_length.dump
+++ b/libraries/test_data/src/test/assets/extractordumps/mp4/sample_with_color_info.mp4.unknown_length.dump
@@ -32,6 +32,7 @@ track 0:
     metadata = entries=[mdta: key=com.apple.quicktime.location.accuracy.horizontal, value=3.754789, mdta: key=com.apple.quicktime.location.ISO6709, value=+37.7450-122.4301+066.374/, mdta: key=com.apple.quicktime.make, value=Apple, mdta: key=com.apple.quicktime.model, value=iPhone 12 Pro Max, mdta: key=com.apple.quicktime.software, value=14.5.1, mdta: key=com.apple.quicktime.creationdate, value=2021-05-25T09:21:51-0700, Mp4Timestamp: creation time=3704804511, modification time=3704804511, timescale=600]
     initializationData:
       data = length 526, hash 7B3FC433
+      data = length 24, hash A31E9935
   sample 0:
     time = 0
     flags = 1