Re: [MMUSIC] The pick-a-config debate - perhaps an useful example

Harald Alvestrand <harald@alvestrand.no> Fri, 31 May 2013 08:05 UTC

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Date: Fri, 31 May 2013 10:05:40 +0200
From: Harald Alvestrand <harald@alvestrand.no>
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To: "Cullen Jennings (fluffy)" <fluffy@cisco.com>
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Cc: mmusic <mmusic@ietf.org>
Subject: Re: [MMUSIC] The pick-a-config debate - perhaps an useful example
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On 05/30/2013 07:47 PM, Cullen Jennings (fluffy) wrote:
> On May 27, 2013, at 2:49 PM, Harald Alvestrand <harald@alvestrand.no> wrote:
>
>> a=group:BUNDLE foo bar
>>
>> m=video
>> a=mid:foo
>> a=imageattr:* [x=160,y=100]
>> a=rtpmap:96:vp8
>>
>> m=video
>> a=mid:bar
>> a=imageattr:* [x=640,y=480]
>> a=rtpmap:96:vp8
>>
>> Now, the video is the same.
> Small nit … as far as I am concerned, if the above is a 3264 based offer, the video could be from two different cameras. You need some other signaling to indicate it is simulcast.
>
I did not intend it to say whether it was simulcast or not - I wasn't 
thinking of simulcast when I wrote it, just about "one of the parties 
says he wants two different, incompatible resolutions". "The video is 
the same" was badly formulated; I meant "The video codec is the same".