- s->streams[i]->duration -=
- ogg_gptopts (s, i, ogg->streams[i].granule, NULL);
- break;
+ if(s->streams[i]->duration && s->streams[i]->start_time == AV_NOPTS_VALUE && !ogg->streams[i].got_start){
+ int64_t start= ogg_gptopts (s, i, ogg->streams[i].granule, NULL);
+ if(av_rescale_q(start, s->streams[i]->time_base, AV_TIME_BASE_Q) > AV_TIME_BASE)
+ s->streams[i]->duration -= start;
+ ogg->streams[i].got_start= 1;
+ streams_left--;
+ }
+ if(streams_left<=0)
+ break;