libavformat/flvdec.c:442: error: Uninitialized Value
  The value read from flags was never initialized.

libavformat/flvdec.c:442:22: 
440.     pkt->stream_index = st->index;
441. 
442.     if (is_audio || ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY))
                          ^
443.         pkt->flags |= AV_PKT_FLAG_KEY;
444. 
