[opus] comment writing in opus / liboggz

[Timothy B. Terriberry]

Ian Malone wrote:
> out, due to the Opus pre-seek, I think. Fixing that probably requires
> adding an Opus-specific metric to liboggz, since the current default
> linear one doesn't deal with first granule position being set. Thought
> I'd check before getting into that whether anyone has looked at this
> already?

I thought Mark Harris implemented this in 
<https://git.xiph.org/?p=liboggz.git;a=commitdiff;h=0a523700afbb>. I'm 
not sure there's been a release since then, though. Are you looking at 
the latest git, or is there something wrong with that implementation?

> Another thought, could vorbiscomment do with having Opus comment support added?

Or make an opuscomment for opus-tools. I'm not sure which is the better 
approach, though the latter certainly seems like it would be less 
surprising for users.