Re: [rtcweb] JSEP: Relaxing SDP O/A rules?

Harald Alvestrand <harald@alvestrand.no> Thu, 04 October 2012 08:57 UTC

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Date: Thu, 04 Oct 2012 10:57:30 +0200
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Subject: Re: [rtcweb] JSEP: Relaxing SDP O/A rules?
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On 10/03/2012 05:26 PM, Martin Thomson wrote:
> This is an expansion on 3264. This is what draft-*-jsep needs to 
> describe clearly, if that is appropriate. I am slowly reaching the 
> conclusion that pranswer is a complication that we don't need, 
> especially since - for those who care about the functionality - it can 
> be replicated by editing offers and answers.

I would be very happy to lose PRANSWER if the SIP guys tell us they can 
successfully gateway to systems using provisional SIP answers (which I 
think is the same thing as the one called "serial forking") without them.

For the Web use case, I think PRANSWER is an unnecessary distraction; if 
we're writing both initiator and responder, multiple O/A rounds, or use 
of multiple PeerConnections, is a much cleaner solution for the use 
cases I can wrap my head around.