IPMOVIE_SIGNATURE_SIZE  504 libavformat/ipmovie.c     if (strncmp(p->buf, IPMOVIE_SIGNATURE, IPMOVIE_SIGNATURE_SIZE) != 0)
IPMOVIE_SIGNATURE_SIZE  526 libavformat/ipmovie.c     ipmovie->next_chunk_offset = IPMOVIE_SIGNATURE_SIZE + 6;