ffmpegvt.patch

diff --git a/libavcodec/videotoolbox.c b/libavcodec/videotoolbox.c
index b21eccb..2c34cbb 100644
--- a/libavcodec/videotoolbox.c
+++ b/libavcodec/videotoolbox.c
@@ -315,6 +315,11 @@ static void videotoolbox_decoder_callback(void *opaque,
         return;
     }
 
+    if (flags & kVTDecodeInfo_FrameDropped) {
+        av_log(NULL, AV_LOG_DEBUG, "vt decoder cb: frame dropped\n");
+        return;
+    }
+
     vtctx->frame = CVPixelBufferRetain(image_buffer);
 }