Re: [codec] draft-ietf-codec-oggopus: attached pictures

"Timothy B. Terriberry" <tterribe@xiph.org> Sun, 31 August 2014 05:23 UTC

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Subject: Re: [codec] draft-ietf-codec-oggopus: attached pictures
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Mark Harris wrote:
> If the draft included a way to add arbitrary binary metadata to the
> Ogg Opus stream, or allowed an Ogg Opus file to contain attached

There are two possibilities:

1) A proposal for adding binary metadata breaks already-encoded files, 
in which case I don't think we should do it, considering people have 
been producing those files for over two years now under the expectation 
that they would continue to work, or

2) A proposal for adding binary metadata does not break already-encoded 
files, in which case we have exactly the future extension mechanism you 
want (emphasis on "future").

Your Proposal 3 obviously qualifies. I believe Proposal 4 could be made 
to work (some care is required around the Vorbis issue, and to not paint 
ourselves into a corner later, but those are details).

-As an individual