[vorbis] packetizing an ogg stream

[rillian]

On Wednesday, August 15, 2001, at 04:31 , Jeroen Vreeken wrote:

> I am looking for some pointers on how to packetize an ogg stream.
> My idea is to use udp packets for transport, so I would need a way that
> would minimalize the impact of lost packets.

There's an rtp payload draft format at 
http://www.xiph.org/ogg/vorbis/doc/draft-moffitt-vorbis-rtp-00.txt (and 
it's expired :) Comments welcome.

The unresolved issue is how to send the three header packets (including 
the codebooks) which must be made available immediately to new connects 
and transmitted losslessly. There's also been some discussion regarding 
the codebook header being prohibitively large in applications with many 
short segments (like commercial radio advertising) or contrariwise, how 
to change metadata independently of the codebooks, if that issue is 
handled by compression as a continuous stream.

> Are there any code examples out there for this?

Not that I'm aware of. Two programs that would be good places to start 
are icecast2 (which does http vorbis streaming) and Apple's Darwin 
Streaming Server (which does quicktime over rtp).

  -r

p.s. vorbis-dev is the more appropriate list for this question. I've 
cc'd.

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