compute_pkt_fields2  647 libavformat/mux.c     ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
compute_pkt_fields2  881 libavformat/mux.c         if ((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))