Subject: Re: [AVT] Working Group Last Call: draft-ietf-avt-rfc3047-bis-06.txt

From: Colin Perkins <[email-masked]>
Date: Wed, 2 Jul 2008 08:43:41 +0100

On 30 Jun 2008, at 03:01, Randell Jesup wrote:
> "Even, Roni" <[email-masked]> writes:
>>> 3.2) "An application MAY switch bit rates
>>>    from packet to packet by defining two payload type values and
>>>    switching between them."
>>> -> it is not limited to 2
>
>> [RE:] It is from the RFC3047 that had two bit rates. I will change  
>> to "An
>> application MAY switch bit rates and clock rates from packet to  
>> packet by
>> defining different payload type value and switching between them."
>
> I haven't been following this draft, but please check the AVT  
> archives -
> mixing clock rates in the same RTP stream (by switching between  
> payloads
> with different RTP timestamp rates) causes some real problems.

True enough - any chance of you writing some of this up as an  
internet draft? It's too late to change the way RTP handles  
timestamps, but we can give some guidance on how to avoid the  
problems when mixing clock rates in a single RTP session.

-- 
Colin Perkins
http://csperkins.org/

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