diff --git a/libraries/muxer/src/main/java/androidx/media3/muxer/FragmentedMp4Muxer.java b/libraries/muxer/src/main/java/androidx/media3/muxer/FragmentedMp4Muxer.java
index 1e96ddee23..d04eb57125 100644
--- a/libraries/muxer/src/main/java/androidx/media3/muxer/FragmentedMp4Muxer.java
+++ b/libraries/muxer/src/main/java/androidx/media3/muxer/FragmentedMp4Muxer.java
@@ -151,7 +151,9 @@ public final class FragmentedMp4Muxer implements AutoCloseable {
           MimeTypes.VIDEO_H263,
           MimeTypes.VIDEO_H264,
           MimeTypes.VIDEO_H265,
-          MimeTypes.VIDEO_MP4V);
+          MimeTypes.VIDEO_MP4V,
+          MimeTypes.VIDEO_VP9,
+          MimeTypes.VIDEO_APV);
 
   /** A list of supported audio {@linkplain MimeTypes sample MIME types}. */
   public static final ImmutableList<String> SUPPORTED_AUDIO_SAMPLE_MIME_TYPES =
diff --git a/libraries/muxer/src/main/java/androidx/media3/muxer/Mp4Muxer.java b/libraries/muxer/src/main/java/androidx/media3/muxer/Mp4Muxer.java
index 1706bf10d4..5430c54add 100644
--- a/libraries/muxer/src/main/java/androidx/media3/muxer/Mp4Muxer.java
+++ b/libraries/muxer/src/main/java/androidx/media3/muxer/Mp4Muxer.java
@@ -354,7 +354,9 @@ public final class Mp4Muxer implements AutoCloseable {
           MimeTypes.VIDEO_H263,
           MimeTypes.VIDEO_H264,
           MimeTypes.VIDEO_H265,
-          MimeTypes.VIDEO_MP4V);
+          MimeTypes.VIDEO_MP4V,
+          MimeTypes.VIDEO_VP9,
+          MimeTypes.VIDEO_APV);
 
   /** A list of supported audio {@linkplain MimeTypes sample MIME types}. */
   public static final ImmutableList<String> SUPPORTED_AUDIO_SAMPLE_MIME_TYPES =