[vorbis-dev] RFC draft for Vorbis over RTP

[Tor-Einar Jarnbjo]

Jack Moffitt wrote:

>(Btw, I fully expect someone to respond quoting my own forgotten
>arguments against exactly this.)
>  
>
One drawback is of course, that you can't take any existing Ogg/Vorbis 
stream or the output of any Ogg/Vorbis encoder, feed it to the streaming 
server and expect it to work. If you restrict the entire transmission to 
one set of codebooks, you need "RTP enabled" encoders, which can be 
configured to follow this restriction. I am not able to judge the impact 
of this myself and it is difficult to estimate which quality gain to 
expect by changing the codebooks "on the fly". AFAIK, the reference 
encoder works with a fixed set of codebooks anyway, but then the 
question comes up: Was the ability of dynamic codebooks in the format 
spec really worth the added implementation complexity?

But, unrestricted streaming of any chained Ogg/Vorbis files may cause 
other problems. What if other relevant parameters change - like sample 
rate or number of channels? Is it possible to model this using SDP/RTP? 
I think not...

Tor
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