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Re: Symmetrical streams

From: Harald Alvestrand <harald@alvestrand.no>
Date: Tue, 12 Jul 2011 13:48:02 +0200
Message-ID: <4E1C3472.1090000@alvestrand.no>
To: public-webrtc@w3.org
On 07/11/11 22:18, Magnus Westerlund wrote:
>
>> It's logical for these RTP sessions to be bidirectional.
> RTCP within an given RTP session should always be bi-directional for
> efficiency in number of transport flows needing to be established and
> NAT traversal. Some application usages will result in that some RTP
> session will only be unidirectional when it comes to actual media
> streams. And uni-directional media streams of different purposes should
> not be group together into a common RTP session over the same
> bi-directional transport just to create bi-directional flows as that
> messes with RTCP behavior.
>
To be clear about the word "purpose" here, since it's gotten me into 
trouble several times:

Sending two video streams from one sender (for instance a MUC) to one 
recipient (for instance an user) counts as one "purpose", right? Even 
though one may be a high-res document-sharing screencast and the other 
is a thumbnail-appropriate talking head?

While sending an audio stream and a video stream, even though they come 
from the same source and are intended to be presented together, counts 
as two different "purposes", right?

                                      Harald
Received on Tuesday, 12 July 2011 11:48:32 GMT

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