os->lastdts = os->granule - duration;
if (s->streams[idx]->start_time == AV_NOPTS_VALUE) {
s->streams[idx]->start_time = FFMAX(os->lastpts, 0);
- if (s->streams[idx]->duration)
+ if (s->streams[idx]->duration != AV_NOPTS_VALUE)
s->streams[idx]->duration -= s->streams[idx]->start_time;
}
priv->final_pts = AV_NOPTS_VALUE;