--- a/dom/media/mediasource/TrackBuffersManager.cpp
+++ b/dom/media/mediasource/TrackBuffersManager.cpp
@@ -116,26 +116,24 @@ RefPtr<TrackBuffersManager::AppendPromis
 TrackBuffersManager::AppendData(MediaByteBuffer* aData,
                                 const SourceBufferAttributes& aAttributes)
 {
   MOZ_ASSERT(NS_IsMainThread());
   MSE_DEBUG("Appending %lld bytes", aData->Length());
 
   mEnded = false;
 
-  RefPtr<MediaByteBuffer> buffer = aData;
-
-  return InvokeAsync(GetTaskQueue(), this,
-                     __func__, &TrackBuffersManager::DoAppendData,
-                     buffer, aAttributes);
+  return InvokeAsync<RefPtr<MediaByteBuffer>, SourceBufferAttributes&&>(
+           GetTaskQueue(), this, __func__,
+           &TrackBuffersManager::DoAppendData, aData, aAttributes);
 }
 
 RefPtr<TrackBuffersManager::AppendPromise>
-TrackBuffersManager::DoAppendData(RefPtr<MediaByteBuffer> aData,
-                                  SourceBufferAttributes aAttributes)
+TrackBuffersManager::DoAppendData(MediaByteBuffer* aData,
+                                  const SourceBufferAttributes& aAttributes)
 {
   RefPtr<AppendBufferTask> task = new AppendBufferTask(aData, aAttributes);
   RefPtr<AppendPromise> p = task->mPromise.Ensure(__func__);
   QueueTask(task);
 
   return p;
 }
 

--- a/dom/media/mediasource/TrackBuffersManager.h
+++ b/dom/media/mediasource/TrackBuffersManager.h
@@ -168,18 +168,18 @@ public:
 
 private:
   typedef MozPromise<bool, MediaResult, /* IsExclusive = */ true> CodedFrameProcessingPromise;
 
   // for MediaSourceDemuxer::GetMozDebugReaderData
   friend class MediaSourceDemuxer;
   ~TrackBuffersManager();
   // All following functions run on the taskqueue.
-  RefPtr<AppendPromise> DoAppendData(RefPtr<MediaByteBuffer> aData,
-                                     SourceBufferAttributes aAttributes);
+  RefPtr<AppendPromise> DoAppendData(MediaByteBuffer* aData,
+                                     const SourceBufferAttributes& aAttributes);
   void ScheduleSegmentParserLoop();
   void SegmentParserLoop();
   void InitializationSegmentReceived();
   void ShutdownDemuxers();
   void CreateDemuxerforMIMEType();
   void ResetDemuxingState();
   void NeedMoreData();
   void RejectAppend(const MediaResult& aRejectValue, const char* aName);