In the 4.5.0 release Opus is finally supported. The LOOP_START, LOOP_END and LOOP_BIDI tags however are not parsed like they are for FLAC and Vorbis audio.
Here is a pk3 that replaces the MAP01 and MAP02 music. The MAP01 track is a Vorbis file that has an intentionally awful loop start and end specified, and works as expected. The MAP02 music is an Opus track with the same loop comment tags, but it plays without looping. Not until it reaches the end of the track anyway.
Opus loop comments not parsed
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- Graf Zahl
- Lead GZDoom+Raze Developer

- Posts: 49252
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Re: Opus loop comments not parsed
All support for Opus right now is pure playback, it was just a libsndfile replacement.
Re: Opus loop comments not parsed
I've posted a pull request that adds support for this feature: https://github.com/coelckers/ZMusic/pull/18