libavformat/flvdec.c:837: error: Uninitialized Value
  The value read from size was never initialized.

libavformat/flvdec.c:837:9: 
835.         }
836.     } else {
837.         size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK, 1);
             ^
838.     }
839. 
