[opus] Opus File Format

Simon G4ELI/HB9DRV simon at sdr-radio.com
Tue Feb 26 02:55:21 PST 2013


Thanks for the link. At the moment I'm *very* happy with Opus for compressing audio in my remote radio installations, I'm looking forward to 1.1 moving into beta. It's not essential that I save audio using Opus - WMA is not bad, there's always WAV.

What I would like to do is throw in a few suggestions if a file format is ever designed by the Opus / Ogg team, one desire would be to put tags anywhere in the recording. Maybe Ogg supports this - I don't know.

An example I would use is to tag the current frequency of the recording, as the user changes the frequency then add a new tag. I'm not going to do anything which isn't an Opus / Ogg standard though...


-----Original Message-----
From: opus-bounces at xiph.org [mailto:opus-bounces at xiph.org] On Behalf Of Ian Malone

Hi, yes the Ogg encapsulation (the default format for files) supports tags, see http://www.xiph.org/vorbis/doc/v-comment.html for the standard types. I'm not sure what tools you can use to manipulate them, see the various --artist, --title and --comment arguments for opusenc https://mf4.xiph.org/jenkins/view/opus/job/opus-tools/ws/man/opusenc.html
I don't know if the standard vorbiscomment or oggz-comment have support yet for editing them after encoding. Not sure whether you can do something similar with RTP. 

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