libavformat/flvdec.c:414: error: Uninitialized Value
  The value read from size was never initialized.

libavformat/flvdec.c:414:10: 
412.     }
413. 
414.     ret= av_get_packet(s->pb, pkt, size);
              ^
415.     if (ret <= 0) {
416.         return AVERROR(EIO);
