diff --git a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/FrameworkMuxer.java b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/FrameworkMuxer.java
index e92c42281e..0f80a1f0ec 100644
--- a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/FrameworkMuxer.java
+++ b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/FrameworkMuxer.java
@@ -26,7 +26,6 @@ import android.media.MediaFormat;
 import android.media.MediaMuxer;
 import android.os.ParcelFileDescriptor;
 import android.util.SparseLongArray;
-import androidx.annotation.Nullable;
 import androidx.annotation.RequiresApi;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.Format;
@@ -97,13 +96,6 @@ import java.nio.ByteBuffer;
       return true;
     }
 
-    @Override
-    public boolean supportsSampleMimeType(
-        @Nullable String sampleMimeType, String containerMimeType) {
-      return getSupportedSampleMimeTypes(MimeTypes.getTrackType(sampleMimeType), containerMimeType)
-          .contains(sampleMimeType);
-    }
-
     @Override
     public ImmutableList<String> getSupportedSampleMimeTypes(
         @C.TrackType int trackType, String containerMimeType) {
diff --git a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/Muxer.java b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/Muxer.java
index 44ad95fe06..8c94bdd5a1 100644
--- a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/Muxer.java
+++ b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/Muxer.java
@@ -16,7 +16,6 @@
 package com.google.android.exoplayer2.transformer;
 
 import android.os.ParcelFileDescriptor;
-import androidx.annotation.Nullable;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.Format;
 import com.google.android.exoplayer2.util.MimeTypes;
@@ -28,11 +27,12 @@ import java.nio.ByteBuffer;
  * Abstracts media muxing operations.
  *
  * <p>Query whether {@linkplain Factory#supportsOutputMimeType(String) container MIME type} and
- * {@linkplain Factory#supportsSampleMimeType(String, String) sample MIME types} are supported and
- * {@linkplain #addTrack(Format) add all tracks}, then {@linkplain #writeSampleData(int, ByteBuffer,
- * boolean, long) write sample data} to mux samples. Once any sample data has been written, it is
- * not possible to add tracks. After writing all sample data, {@linkplain #release(boolean) release}
- * the instance to finish writing to the output and return any resources to the system.
+ * {@linkplain Factory#getSupportedSampleMimeTypes(int, String)} sample MIME types} are supported
+ * and {@linkplain #addTrack(Format) add all tracks}, then {@linkplain #writeSampleData(int,
+ * ByteBuffer, boolean, long) write sample data} to mux samples. Once any sample data has been
+ * written, it is not possible to add tracks. After writing all sample data, {@linkplain
+ * #release(boolean) release} the instance to finish writing to the output and return any resources
+ * to the system.
  */
 /* package */ interface Muxer {
 
@@ -81,12 +81,6 @@ import java.nio.ByteBuffer;
      */
     boolean supportsOutputMimeType(String mimeType);
 
-    /**
-     * Returns whether the sample {@linkplain MimeTypes MIME type} is supported with the given
-     * container {@linkplain MimeTypes MIME type}.
-     */
-    boolean supportsSampleMimeType(@Nullable String sampleMimeType, String containerMimeType);
-
     /**
      * Returns the supported sample {@linkplain MimeTypes MIME types} for the given {@link
      * C.TrackType} and container {@linkplain MimeTypes MIME type}.
diff --git a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/MuxerWrapper.java b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/MuxerWrapper.java
index d7f63f1a41..1b53fe04ba 100644
--- a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/MuxerWrapper.java
+++ b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/MuxerWrapper.java
@@ -88,7 +88,8 @@ import java.nio.ByteBuffer;
 
   /** Returns whether the sample {@linkplain MimeTypes MIME type} is supported. */
   public boolean supportsSampleMimeType(@Nullable String mimeType) {
-    return muxerFactory.supportsSampleMimeType(mimeType, containerMimeType);
+    @C.TrackType int trackType = MimeTypes.getTrackType(mimeType);
+    return getSupportedSampleMimeTypes(trackType).contains(mimeType);
   }
 
   /**
diff --git a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/Transformer.java b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/Transformer.java
index f2827f338a..d6fe2bc3b3 100644
--- a/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/Transformer.java
+++ b/library/transformer/src/main/java/com/google/android/exoplayer2/transformer/Transformer.java
@@ -483,7 +483,10 @@ public final class Transformer {
 
     private void checkSampleMimeType(String sampleMimeType) {
       checkState(
-          muxerFactory.supportsSampleMimeType(sampleMimeType, containerMimeType),
+          muxerFactory
+              .getSupportedSampleMimeTypes(
+                  MimeTypes.getTrackType(sampleMimeType), containerMimeType)
+              .contains(sampleMimeType),
           "Unsupported sample MIME type "
               + sampleMimeType
               + " for container MIME type "
diff --git a/library/transformer/src/test/java/com/google/android/exoplayer2/transformer/TransformerEndToEndTest.java b/library/transformer/src/test/java/com/google/android/exoplayer2/transformer/TransformerEndToEndTest.java
index 2b97341257..7142d8c7dd 100644
--- a/library/transformer/src/test/java/com/google/android/exoplayer2/transformer/TransformerEndToEndTest.java
+++ b/library/transformer/src/test/java/com/google/android/exoplayer2/transformer/TransformerEndToEndTest.java
@@ -882,11 +882,6 @@ public final class TransformerEndToEndTest {
       return true;
     }
 
-    @Override
-    public boolean supportsSampleMimeType(String sampleMimeType, String outputMimeType) {
-      return frameworkMuxerFactory.supportsSampleMimeType(sampleMimeType, outputMimeType);
-    }
-
     @Override
     public ImmutableList<String> getSupportedSampleMimeTypes(
         @C.TrackType int trackType, String containerMimeType) {