[xiph-rtp] Re: [Speex-dev] new RTP development list

[Tor-Einar Jarnbjo]

Onsdag, 20 oktober 2004, skrev Aaron Colwell <acolwell at real.com>:

>Why are chained streams not going to be supported? I looked at the wiki
>pages and I don't agree with the arguments for dropping chaining 
support.

Well, one major obstacle is that common control protocols for RTP 
sessions (RTSP and SDP) are not directly supporting all the chaining 
mechanisms. E.g., you cannot simply change the sample rate or number 
of channels within a session as these are specified in the session's 
SDP descriptor.

A simple workaround would be to use RTSP for the same functionality 
as chaining is used now. If I'm not completely wrong, it would be 
a straight forward task for an RTP server to inform the client using 
RTSP that the session is about to end and recommend the client to 
switch over to another specified session, which is then setup using 
completely different parameters if necessary.

Tor