MM_HEADER_LEN_AV   64 libavformat/mm.c     if (AV_RL32(&p->buf[2]) != MM_HEADER_LEN_V && AV_RL32(&p->buf[2]) != MM_HEADER_LEN_AV)
MM_HEADER_LEN_AV  107 libavformat/mm.c     if (length == MM_HEADER_LEN_AV) {