libavformat/flvdec.c:376: error: Uninitialized Value
  The value read from flags was never initialized.

libavformat/flvdec.c:376:22: 
374.     pkt->stream_index = st->index;
375. 
376.     if (is_audio || ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY))
                          ^
377.         pkt->flags |= PKT_FLAG_KEY;
378. 
