ff_fetch_timestamp   47 libavcodec/mpegvideo_parser.c             ff_fetch_timestamp(s, buf-buf_start-4, 1);
ff_fetch_timestamp  156 libavcodec/parser.c         ff_fetch_timestamp(s, 0, 0);
ff_fetch_timestamp   68 libavcodec/parser.h void ff_fetch_timestamp(AVCodecParserContext *s, int off, int remove);