static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit) { AVPacket pkt1, *pkt = &pkt1; ASFStream *asf_st; int64_t pts; int64_t pos= *ppos; int i; int64_t start_pos[ASF_MAX_STREAMS]; for(i=0; i<s->nb_streams; i++){ start_pos[i]= pos; } if (s->packet_size > 0) pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset; *ppos= pos; avio_seek(s->pb, pos, SEEK_SET); //printf("asf_read_pts\n"); asf_reset_header(s); for(;;){ if (av_read_frame(s, pkt) < 0){ av_log(s, AV_LOG_INFO, "asf_read_pts failed\n"); return AV_NOPTS_VALUE; } pts= pkt->pts; av_free_packet(pkt); if(pkt->flags&AV_PKT_FLAG_KEY){ i= pkt->stream_index; asf_st= s->streams[i]->priv_data; // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0); pos= asf_st->packet_pos; av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME); start_pos[i]= asf_st->packet_pos + 1; if(pkt->stream_index == stream_index) break; } } *ppos= pos; //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts); return pts; }