[vorbis-dev] RFC draft for Vorbis over RTP

[Ralph Giles]

On Wed, May 26, 2004 at 11:02:00AM +0200, Jack Moffitt wrote:
> Why don't we just say that for transmission of RTP, a single set of
> codecs valid for the entire transmission is required?

This certainly simplifies things in practice with in-band headers 
or header request over http. Seems a bit of a wash if there's a separate 
header stream.

Outside of using a separate metadata stream (which would need to be 
separate from the header stream, really. otherwise how do you know when 
it's changed?) I think allowing in-band comment packets anywhere in the 
rtp stream makes a lot of sense. The only reason we don't allow this in 
Ogg Vorbis is seeking, which isn't relevent to RTP. You can easily 
retransmit without adding much to the bitrate, and it's the one bit of 
info you can't reasonably cache. Furthermore, it's much simpler for 
clients if than having to support a separate access method just to 
change the current artist/title.

 -r
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