static int mov_write_pasp_tag(AVIOContext *pb, MOVTrack *track)
{
    AVRational sar;
    av_reduce(&sar.num, &sar.den, track->par->sample_aspect_ratio.num,
              track->par->sample_aspect_ratio.den, INT_MAX);

    avio_wb32(pb, 16);
    ffio_wfourcc(pb, "pasp");
    avio_wb32(pb, sar.num);
    avio_wb32(pb, sar.den);
    return 16;
}
Unknown