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Re: [rtcweb] Review of draft-ietf-rtcweb-jsep-07

Jonathan Lennox <jonathan@vidyo.com> Fri, 25 July 2014 13:32 UTC

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From: Jonathan Lennox <jonathan@vidyo.com>
To: Paul Kyzivat <pkyzivat@alum.mit.edu>
Thread-Topic: [rtcweb] Review of draft-ietf-rtcweb-jsep-07
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Date: Fri, 25 Jul 2014 13:32:11 +0000
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Subject: Re: [rtcweb] Review of draft-ietf-rtcweb-jsep-07
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On Jul 25, 2014, at 8:12 AM, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:

> On 7/24/14 10:35 PM, Justin Uberti wrote:
> 
>> On Thu, Jul 24, 2014 at 9:14 PM, Paul Kyzivat <pkyzivat@alum.mit.edu
>> <mailto:pkyzivat@alum.mit.edu>> wrote:
>> 
>>    Doesn't OfferToReceive generate *recvonly* m-lines. (It hardly makes
>>    sense for it to create *sendonly* lines.)
>> 
>> It can do either, as Eric pointed out in the presentation on Wednesday.
>> If you specify a number to receive that is less than the expected number
>> of m-lines, then the remainder will be marked as sendonly.
> 
> OK. I had seen that mentioned in JSEP, but it was new to me and I hadn't really grokked it. It does sound like it might work.

If I understood the JSEP presentation correctly, in the current APIs you can generate *either* sendonly or recvonly m-lines for an offer, but you can’t generate *both*.  You either get sendrecv and recvonly, or sendrecv and sendonly.  Is that correct?

(Presumably you could fake it by putting the sendrecv lines on hold, though?)

Also, is there any way to generate inactive m-lines?

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