OGG Vorbis files not considered as valid input?

[xparq]

The README doesn't mention OGG, so I didn't expect it to work, but then #224 (after #209 etc.) does, so now I'm confused...

If OGG is supported actually, does it perhaps mean Opus only? Mine are Vorbis .ogg files saved by Reaper 6.x.

Thanks!

(If Vorbis is supposed to work, we can get back to debugging it, if you're interested.)