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Re: [MMUSIC] Issue #27: Allow RTP attributes in non-media m= sections

Christer Holmberg <christer.holmberg@ericsson.com> Thu, 16 February 2017 18:07 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Eric Rescorla <ekr@rtfm.com>
Thread-Topic: [MMUSIC] Issue #27: Allow RTP attributes in non-media m= sections
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Date: Thu, 16 Feb 2017 18:07:40 +0000
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Subject: Re: [MMUSIC] Issue #27: Allow RTP attributes in non-media m= sections
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Yes, I meant "not" :)

Sent from my iPhone

On 16 Feb 2017, at 18.59, Eric Rescorla <ekr@rtfm.com<mailto:ekr@rtfm.com>> wrote:



On Thu, Feb 16, 2017 at 9:07 AM, Christer Holmberg <christer.holmberg@ericsson.com<mailto:christer.holmberg@ericsson.com>> wrote:
Hi,

>See:
>https://github.com/cdh4u/draft-sdp-bundle/issues/27
>https://github.com/rtcweb-wg/jsep/issues/528
>
>The basic issue is that it's possible to have a situation where you have both
>media and data m= sections but the BUNDLE tag is associated with the data
>m= section and now you need to put the TRANSPORT and IDENTICAL
>attributes somewhere. The JSEP editors discussed this and came to the
>conclusion that it should go with the BUNDLE tag (i.e., in the data m= section)
>and that BUNDLE should forbid this, but it requires a change to BUNDLE.

Did you mean to say that BUNDLE should NOT forbid this?

Based on your GitHub discussion, my understanding is that you want to allow to include RTP-specific parameters (‘rtcp-mux’, ‘rtcp’, ‘rtcp-mux-only’ attributes etc) in the data m= section.

Yes/


To repeat what I said on GitHub:

This has been discussed in the past, and the outcome has been to now allow RTP-specific parameters in non-RTP m= sections.

Do you mean "not" rather than now?

-Ekr


A solution would be to simply change the bundle tag when the RTP m= sections are added.

…OR, we change the mux category for the RTP-specific parameters. But, that of course means they have to be added to every RTP m= section.

Regards,

Christer

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