[vorbis-dev] streaming and VBR

[Michael Smith]

On Monday 13 October 2003 03:42, Olaf Matthes wrote:
> Hi list,
>
> I have a very anoying problem when streaming ogg vorbis: due to the
> variable bitrate encoding data rates sometimes drop to a very low value
> when there is no audio input signal. After a while the server (Icecast2)
> just drops my stream because no new ogg pages arrive.
>
> For streaming I use a software that I have written but I can't find a
> way to tell it to never drop data rate below a given value. In the
> encoder example various ways of specifying data rates are shown, but
> none of them seem to help.
>
> Is there a way to tell vorbis not go below X bps? Or to do 'real' CBR?
> BTW, I'm on Windows, using VC++ in case this matters.
>

There's no way to tell vorbis to add 'useless' padding bits. You can do it 
externally if you want, but it wouldn't be a very good idea to do that.

The more sensible approach (ices2 does this) is to just produce an ogg page 
(using ogg_stream_flush instead of ogg_stream_pageout) at regular intervals - 
ices2 will force a stream flush after 2 seconds of data if there have been no 
'natural' pages produced.

Mike

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