#98 Opus files don't show up for playback

[Interlude]

I noticed that .opus audio files are not displayed in the music and file player.
xine-list-1.2 returns audio/opus and audio/x-ogg as playback feature, so in theory .opus files should be playable.
Is there probably some array that needs an update to include .opus as media file?

[Interlude]

Further digging with the xine player itself:
doesn't play the .opus files as well, the log says s.th. like
audio_decoder: no plugin for 'Opus Audio'
My Xinelib version is 1.2.11-2.
Opus audio support should be there introduced in 1.2.10:
The OGG Media Unpacker adds support for the Opus format;

[Interlude]

Hmm, turns out this is file-specific
It tried this sample Opus file, which plays.
My Opus files however (encoded with Lavf58.76.100 according to the metadata) don't play.

[Interlude]

To reproduce it:
use yt-dlp -x on a random YT video URI. The output file isn't recognized by xine. VLC, MPV and fb2k have no problems with it.