diff --git a/libraries/muxer/src/main/java/androidx/media3/muxer/Mp4MoovStructure.java b/libraries/muxer/src/main/java/androidx/media3/muxer/Mp4MoovStructure.java
index dc1b929e77..921a41c487 100644
--- a/libraries/muxer/src/main/java/androidx/media3/muxer/Mp4MoovStructure.java
+++ b/libraries/muxer/src/main/java/androidx/media3/muxer/Mp4MoovStructure.java
@@ -37,8 +37,6 @@ import org.checkerframework.checker.nullness.qual.PolyNull;
   public interface TrackMetadataProvider {
     Format format();
 
-    int sortKey();
-
     int videoUnitTimebase();
 
     ImmutableList<BufferInfo> writtenSamples();
diff --git a/libraries/muxer/src/main/java/androidx/media3/muxer/Mp4Writer.java b/libraries/muxer/src/main/java/androidx/media3/muxer/Mp4Writer.java
index 513d721747..35d310ae17 100644
--- a/libraries/muxer/src/main/java/androidx/media3/muxer/Mp4Writer.java
+++ b/libraries/muxer/src/main/java/androidx/media3/muxer/Mp4Writer.java
@@ -397,11 +397,6 @@ import java.util.concurrent.atomic.AtomicBoolean;
           : 90_000;
     }
 
-    @Override
-    public int sortKey() {
-      return sortKey;
-    }
-
     @Override
     public ImmutableList<BufferInfo> writtenSamples() {
       return ImmutableList.copyOf(writtenSamples);