static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags) { AVStream *st = s->streams[stream_index]; int64_t seconds; if (!s->bit_rate) return AVERROR_INVALIDDATA; if (sample_time < 0) sample_time = 0; seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den); avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET); ff_update_cur_dts(s, st, sample_time); return 0; }