https://bugzilla.redhat.com/show_bug.cgi?id=2262410
Akira TAGOH tagoh@redhat.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Component|mpv |libass CC| |kwizart@gmail.com, | |martin.sourada@gmail.com, | |xavier@bachelot.org
--- Comment #12 from Akira TAGOH tagoh@redhat.com --- Sorry, correctly libass. see https://github.com/libass/libass/blob/649a7c2e1fc6f4188ea1a89968560715800b88...
Are they really ignoring the lang object? As far as I can say, you removed it in this change https://src.fedoraproject.org/rpms/google-noto-fonts/c/609f6bc1323476289beda... and after restoring it, mpv works just fine.
fontconfig does. that's why it works after adding lang="ar" back. In that case, fontconfig drops it because you aren't on ar locale. but the problem is that Noto Sans Arabic isn't for ar only. this was why I removed it there.
Anyway, apparently libass doesn't rely on fontconfig to get the best font against requests. they just gather font list instead and use something they believe it is a best font for context, which isn't in this case. then it should be fixed in libass.