2 files changed, 6 insertions, 8 deletions
diff --git a/dom/media/webm/WebMDemuxer.cpp b/dom/media/webm/WebMDemuxer.cpp
index 20ed71581..ac371fa7f 100644
--- a/dom/media/webm/WebMDemuxer.cpp
+++ b/dom/media/webm/WebMDemuxer.cpp
@@ -651,14 +651,13 @@ WebMDemuxer::GetNextPacket(TrackInfo::TrackType aType, MediaRawDataQueue *aSampl
         if (isKeyframe) {
           // We only look for resolution changes on keyframes for both VP8 and
           // VP9. Other resolution changes are invalid.
-          if (mLastSeenFrameWidth.isSome() && mLastSeenFrameHeight.isSome() &&
-            (si.w != mLastSeenFrameWidth.value() ||
-              si.h != mLastSeenFrameHeight.value())) {
-            mInfo.mVideo.mDisplay = nsIntSize(si.w, si.h);
+          auto dimensions = nsIntSize(si.w, si.h);
+          if (mLastSeenFrameSize.isSome()
+              && (dimensions != mLastSeenFrameSize.value())) {
+            mInfo.mVideo.mDisplay = dimensions;
             mSharedVideoTrackInfo = new SharedTrackInfo(mInfo.mVideo, ++sStreamSourceID);
           }
-          mLastSeenFrameWidth = Some(si.w);
-          mLastSeenFrameHeight = Some(si.h);
+          mLastSeenFrameSize = Some(dimensions);
         }
       }
     }
diff --git a/dom/media/webm/WebMDemuxer.h b/dom/media/webm/WebMDemuxer.h
index 6fff38e7d..a5008022f 100644
--- a/dom/media/webm/WebMDemuxer.h
+++ b/dom/media/webm/WebMDemuxer.h
@@ -237,8 +237,7 @@ private:
   int64_t mLastWebMBlockOffset;
   const bool mIsMediaSource;
 
-  Maybe<uint32_t> mLastSeenFrameWidth;
-  Maybe<uint32_t> mLastSeenFrameHeight;
+  Maybe<nsIntSize> mLastSeenFrameSize;
   // This will be populated only if a resolution change occurs, otherwise it
   // will be left as null so the original metadata is used
   RefPtr<SharedTrackInfo> mSharedVideoTrackInfo;