st->codec->bits_per_coded_sample = wc->bpp;
avpriv_set_pts_info(st, 64, 1, wc->rate);
st->start_time = 0;
- st->duration = wc->samples;
+ if (wc->samples != 0xFFFFFFFFu)
+ st->duration = wc->samples;
if (s->pb->seekable) {
int64_t cur = avio_tell(s->pb);