--- a/dom/media/platforms/ffmpeg/FFmpegVideoDecoder.cpp
+++ b/dom/media/platforms/ffmpeg/FFmpegVideoDecoder.cpp
@@ -297,17 +297,19 @@ FFmpegVideoDecoder<LIBAV_VER>::DoDecodeF
     RefPtr<VideoData> v = VideoData::Create(mInfo,
                                             mImageContainer,
                                             aSample->mOffset,
                                             pts,
                                             duration,
                                             b,
                                             !!mFrame->key_frame,
                                             -1,
-                                            mInfo.ImageRect());
+                                            mInfo.ScaledImageRect(mFrame->width,
+                                                                  mFrame->height));
+
     if (!v) {
       NS_WARNING("image allocation error.");
       mCallback->Error();
       return DecodeResult::DECODE_ERROR;
     }
     mCallback->Output(v);
     return DecodeResult::DECODE_FRAME;
   }