[opus] Opus File Format

[Benjamin Schwartz]

If I were doing this, I would make each frequency switch a "chain
boundary".  This is analogous to having the overall stream actually be a
playlist of consecutive streams, each representing one segment in which the
radio channel was constant.  Then each segment can easily be tagged with
the frequency of the channel.  You can do this using Ogg Vorbis or Ogg Opus
today.


On Tue, Feb 26, 2013 at 9:33 AM, Ian Malone <ibmalone at gmail.com> wrote:

> On 26 February 2013 12:50, Simon G4ELI/HB9DRV <simon at sdr-radio.com> wrote:
>
> >> I don't know whether Opus can continually vary frequency (though I
> don't think so, it's very rare for
> >> audio formats), but communicating that is obviously something the codec
> would need to specify.
>
> >
> > Sorry - I wasn't clear, what I would like to do with any future Opus
> file format is have a tag such as Title which can be continually updated
> throughout the recording, not fixed at the start. Obviously I could design
> my own storage format for this, but it always makes sense to 'go with the
> flow' so to speak.
> >
> > In my case these are radio recordings, so I would add my own custom tag
> 'Radio Frequency' and update this as the user changes the radio's frequency.
> >
>
> Ah, I completely misunderstood that example then. I've never tried it,
> but Kate should be able to do that as metadata:
> http://wiki.xiph.org/Kate#Metadata particularly you can apply it to a
> time range, which is probably what you want when tagging something
> like radio frequency rather than an instantaneous label.
>
> --
> imalone
> http://ibmalone.blogspot.co.uk
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