diff --git a/libraries/transformer/src/main/java/androidx/media3/transformer/DefaultMuxer.java b/libraries/transformer/src/main/java/androidx/media3/transformer/DefaultMuxer.java
index 34d74c8d5c..5dadcece91 100644
--- a/libraries/transformer/src/main/java/androidx/media3/transformer/DefaultMuxer.java
+++ b/libraries/transformer/src/main/java/androidx/media3/transformer/DefaultMuxer.java
@@ -20,9 +20,10 @@ import androidx.media3.common.C;
 import androidx.media3.common.Format;
 import androidx.media3.common.Metadata;
 import androidx.media3.common.util.UnstableApi;
+import androidx.media3.common.util.Util;
 import androidx.media3.muxer.Muxer;
-import androidx.media3.muxer.Muxer.TrackToken;
 import com.google.common.collect.ImmutableList;
+import com.google.errorprone.annotations.CanIgnoreReturnValue;
 import java.nio.ByteBuffer;
 
 /** A default {@link Muxer} implementation. */
@@ -31,22 +32,37 @@ public final class DefaultMuxer implements Muxer {
 
   /** A {@link Muxer.Factory} for {@link DefaultMuxer}. */
   public static final class Factory implements Muxer.Factory {
-    private final Muxer.Factory muxerFactory;
+    private final FrameworkMuxer.Factory muxerFactory;
 
-    /** Creates an instance with {@code videoDurationMs} set to {@link C#TIME_UNSET}. */
+    /** Creates an instance. */
     public Factory() {
-      this(/* videoDurationMs= */ C.TIME_UNSET);
+      this.muxerFactory = new FrameworkMuxer.Factory();
     }
 
     /**
-     * Creates an instance.
+     * @deprecated Use {@link #setVideoDurationUs(long)} instead. Note that a conversion from
+     *     milliseconds to microseconds is required to migrate to {@link #setVideoDurationUs(long)}.
+     */
+    @Deprecated
+    public Factory(long videoDurationMs) {
+      this.muxerFactory =
+          new FrameworkMuxer.Factory().setVideoDurationUs(Util.msToUs(videoDurationMs));
+    }
+
+    /**
+     * Sets the duration of the video track (in microseconds) to enforce in the output.
      *
-     * @param videoDurationMs The duration of the video track (in milliseconds) to enforce in the
+     * <p>The default is {@link C#TIME_UNSET}.
+     *
+     * @param videoDurationUs The duration of the video track (in microseconds) to enforce in the
      *     output, or {@link C#TIME_UNSET} to not enforce. Only applicable when a video track is
      *     {@linkplain #addTrack(Format) added}.
+     * @return This factory.
      */
-    public Factory(long videoDurationMs) {
-      this.muxerFactory = new FrameworkMuxer.Factory(videoDurationMs);
+    @CanIgnoreReturnValue
+    public Factory setVideoDurationUs(long videoDurationUs) {
+      muxerFactory.setVideoDurationUs(videoDurationUs);
+      return this;
     }
 
     @Override
diff --git a/libraries/transformer/src/main/java/androidx/media3/transformer/FrameworkMuxer.java b/libraries/transformer/src/main/java/androidx/media3/transformer/FrameworkMuxer.java
index 85c8bbb467..2146bf2abc 100644
--- a/libraries/transformer/src/main/java/androidx/media3/transformer/FrameworkMuxer.java
+++ b/libraries/transformer/src/main/java/androidx/media3/transformer/FrameworkMuxer.java
@@ -34,6 +34,7 @@ import androidx.media3.common.util.Util;
 import androidx.media3.container.Mp4LocationData;
 import androidx.media3.muxer.Muxer;
 import com.google.common.collect.ImmutableList;
+import com.google.errorprone.annotations.CanIgnoreReturnValue;
 import java.io.IOException;
 import java.lang.reflect.Field;
 import java.nio.ByteBuffer;
@@ -52,10 +53,26 @@ import java.util.Map;
 
   /** {@link Muxer.Factory} for {@link FrameworkMuxer}. */
   public static final class Factory implements Muxer.Factory {
-    private final long videoDurationMs;
+    private long videoDurationUs;
 
-    public Factory(long videoDurationMs) {
-      this.videoDurationMs = videoDurationMs;
+    public Factory() {
+      this.videoDurationUs = C.TIME_UNSET;
+    }
+
+    /**
+     * Sets the duration of the video track (in microseconds) to enforce in the output.
+     *
+     * <p>The default is {@link C#TIME_UNSET}.
+     *
+     * @param videoDurationUs The duration of the video track (in microseconds) to enforce in the
+     *     output, or {@link C#TIME_UNSET} to not enforce. Only applicable when a video track is
+     *     {@linkplain #addTrack(Format) added}.
+     * @return This factory.
+     */
+    @CanIgnoreReturnValue
+    public Factory setVideoDurationUs(long videoDurationUs) {
+      this.videoDurationUs = videoDurationUs;
+      return this;
     }
 
     @Override
@@ -66,7 +83,7 @@ import java.util.Map;
       } catch (IOException e) {
         throw new MuxerException("Error creating muxer", e);
       }
-      return new FrameworkMuxer(mediaMuxer, videoDurationMs);
+      return new FrameworkMuxer(mediaMuxer, videoDurationUs);
     }
 
     @Override
@@ -90,9 +107,9 @@ import java.util.Map;
   private boolean isStarted;
   private boolean isReleased;
 
-  private FrameworkMuxer(MediaMuxer mediaMuxer, long videoDurationMs) {
+  private FrameworkMuxer(MediaMuxer mediaMuxer, long videoDurationUs) {
     this.mediaMuxer = mediaMuxer;
-    this.videoDurationUs = Util.msToUs(videoDurationMs);
+    this.videoDurationUs = videoDurationUs;
     trackTokenToLastPresentationTimeUs = new HashMap<>();
     trackTokenToPresentationTimeOffsetUs = new HashMap<>();
   }
diff --git a/libraries/transformer/src/test/java/androidx/media3/transformer/MediaItemExportTest.java b/libraries/transformer/src/test/java/androidx/media3/transformer/MediaItemExportTest.java
index 80dcb98ed8..1663ac6ce5 100644
--- a/libraries/transformer/src/test/java/androidx/media3/transformer/MediaItemExportTest.java
+++ b/libraries/transformer/src/test/java/androidx/media3/transformer/MediaItemExportTest.java
@@ -1567,9 +1567,7 @@ public final class MediaItemExportTest {
     // Do not use CapturingMuxer.Factory(), as this test checks for a workaround in
     // FrameworkMuxer.
     Transformer transformer =
-        createTransformerBuilder(
-                new FrameworkMuxer.Factory(C.TIME_UNSET), /* enableFallback= */ false)
-            .build();
+        createTransformerBuilder(new FrameworkMuxer.Factory(), /* enableFallback= */ false).build();
     MediaItem mediaItem = MediaItem.fromUri(ASSET_URI_PREFIX + FILE_AUDIO_ELST_SKIP_500MS);
 
     transformer.start(mediaItem, outputDir.newFile().getPath());