https://rivendell.linuxfromscratch.org/blfs/view/9.0-systemd/multimedia/libdvdread.html
Libdvdread-6.0.1
libdvdread
https://www.videolan.org/developers/libdvdnav.html
libdvdnav & libdvdread - VideoLAN
libdvdnavlibdvdreadvideolan
https://lists.mplayerhq.hu/pipermail/mplayer-users/2008-November/074974.html
[MPlayer-users] pre-existing libdvdread
mplayeruserspreexistinglibdvdread