Re: [MMUSIC] M-lines: Wikifying it

[Harald Alvestrand <[e-mail]>]

On 12/03/2012 05:12 PM, Christer Holmberg wrote:
> Hi,
>
>>>>> So, the exercise is NOT about how to apply attributes to individual sources?
>>>> Only in the sense that it is about figuring out which attributes need to be applied to individual sources.
>>> Well, I believe that was my original question :)
>>>
>>> If you want to apply an attribute to an individual source, you must use the ssrc attribute.
>> If you are in the camp that believes that there should be more than oneindependent source per M-line.
>>
>> That camp seemed to me to be in the minority in Atlanta; it was absolutely not the consensus opinion.
> It's not about in which camp someone is, it's about the assumptions we make in the wiki study. If the assumption is one source per m- line, than I think it should be explicitly stated.
Trying again, since I'm obviously not making myself clear:

The two alternative approaches are:

- Everything that needs to be controlled separately is in its own 
M-line. Everything that needs to go on the same RTP session uses BUNDLE 
to get there. Transport parameters get figured out somehow.

- Everything that goes on the same RTP session goes on the same M-line. 
Due to backwards compatible SDP, we may choose to use BUNDLE to lump 
video and audio together - or we may choose MMT if that works for 
people. Anything that needs separate control uses a=ssrc.

In Atlanta, the room was clearly split between the two. I'm trying to 
get real data on how many things need to be redefined for each case.

>
> Regards,
>
> Christer
>
>
>