static int64_t get_dts(AVFormatContext *s, int64_t pos) { AVIOContext *pb = s->pb; int64_t dts; ffm_seek1(s, pos); avio_skip(pb, 4); dts = avio_rb64(pb); av_dlog(s, "dts=%0.6f\n", dts / 1000000.0); return dts; }