libavformat/flvdec.c:407: error: Uninitialized Value
  The value read from size was never initialized.

libavformat/flvdec.c:407:9: 
405.         st->codec->codec_id == CODEC_ID_H264) {
406.         int type = get_byte(s->pb);
407.         size--;
             ^
408.         if (st->codec->codec_id == CODEC_ID_H264) {
409.             int32_t cts = (get_be24(s->pb)+0xff800000)^0xff800000; // sign extension
