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Re: [MMUSIC] [rtcweb] Updating JSEP and BUNDLE

Christer Holmberg <christer.holmberg@ericsson.com> Sun, 31 January 2021 18:07 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Justin Uberti <juberti@google.com>
CC: Roman Shpount <roman@telurix.com>, "Murray S. Kucherawy" <superuser@gmail.com>, Magnus Westerlund <magnus.westerlund=40ericsson.com@dmarc.ietf.org>, "mmusic@ietf.org" <mmusic@ietf.org>
Thread-Topic: [MMUSIC] [rtcweb] Updating JSEP and BUNDLE
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Subject: Re: [MMUSIC] [rtcweb] Updating JSEP and BUNDLE
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Hi,

...

>>>> If I remember correctly, there was a suggestion to keep the existing port zero + bundle-only procedure in JSEP, but define a NEW policy for it. Then, once the new policy gets implemented, it can be used.
>>>
>>> Yes. I had suggested that, and still think that could be a path forward. But we should first see what the aforementioned data says to understand the extent of the need for such a policy.
>>
>> We have been talking mostly about 'max-bundle'. But as far as I understand (and you also mentioned it earlier in the thread) we have the same issue with 'balanced', if the offer contains more than one m- line for the same media type. Or?
>
> You are correct, but the scope of this issue is believed to be far smaller, given the slow adoption of unified plan (which is required for multiple m= lines of the same type). IOW, we may choose a different solution here than in the max-bundle case.

Are you saying that browsers currently don't support multiple m= lines of the same type?

With 'balanced', as long as you only have one m= line per media type, there is no problem, as each m= line will have a unique port value in the offer.

Regards.

Christer

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