}
}
if (s->start_ts == AV_NOPTS_VALUE)
- s->start_ts = s->opt_start_at_first ? s->tseq[0].ts.t : now;
+ s->start_ts = (s->opt_start_at_first && s->tseq) ? s->tseq[0].ts.t : now;
s->end_ts = s->opt_duration ? s->start_ts + s->opt_duration :
AV_NOPTS_VALUE; /* may be overridden later by -E option */
cur_ts = now;