1 files changed, 5 insertions, 6 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);
         }
       }
     }