Re: [MMUSIC] Scope of RTP payload types in BUNDLE?
"Stach, Thomas" <thomas.stach@siemens-enterprise.com> Mon, 10 June 2013 12:48 UTC
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From: "Stach, Thomas" <thomas.stach@siemens-enterprise.com>
To: Paul Kyzivat <pkyzivat@alum.mit.edu>
Thread-Topic: [MMUSIC] Scope of RTP payload types in BUNDLE?
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Date: Mon, 10 Jun 2013 12:40:41 +0000
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References: <749DCA95-2D40-46B3-9A3D-E63356C7A2C1@csperkins.org>, <51A39023.1070605@alum.mit.edu>, <28A125A6-FBD4-4541-892C-DE87CD79E1A9@iii.ca>, <51AF6490.1040409@alum.mit.edu>, <CD0D36C1-25C5-4222-B37E-D02AE2331E8B@iii.ca>, <51B20CD1.5090002@alum.mit.edu> <BLU169-W683BD404A78C1DD8E2B0D593990@phx.gbl>, <51B26996.1090006@alum.mit.edu> <BLU169-W64FD0D8AFD754835DD196C939B0@phx.gbl> <51B4FB67.7000600@alum.mit.edu>
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Cc: "mmusic@ietf.org" <mmusic@ietf.org>
Subject: Re: [MMUSIC] Scope of RTP payload types in BUNDLE?
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> -----Ursprüngliche Nachricht----- > Von: mmusic-bounces@ietf.org [mailto:mmusic-bounces@ietf.org] > Im Auftrag von Paul Kyzivat > Gesendet: Montag, 10. Juni 2013 00:02 > An: Bernard Aboba > Cc: mmusic@ietf.org > Betreff: Re: [MMUSIC] Scope of RTP payload types in BUNDLE? > > On 6/9/13 1:48 PM, Bernard Aboba wrote: > > Paul said: > > > > > There is a big difference between clipping for one > second until the 183 > > > is received, and clipping until the phone is answered > and a 200 received. > > > > [BA] So you're saying it is sufficient to enable media once a 183 is > > received, but not before? I believe that is consistent > with the current > > WebRTC API. The use case document isn't clear that this is the bar > > that is being set, though. > > I'm suggesting that in the case of BUNDLE, there be a > requirement that > media not be sent until an answer is known to have been > received by the > other end. Sending a reliable 183 and awaiting the PRACK > before sending > media would satisfy that. Presumably something similar can serve in a > pure WebRTC environment. > > That will ensure no clipping. > > The objection I hear to this is that some don't implement PRACK. I'm > just saying that we could require support for PRACK with support for > BUNDLE. Then that argument becomes bogus. Just as well, we could require ICE together with BUNDLE and re-use how ICE deals with reliability of provisional reponses. In the RTCWEB this would be a non-issue. Environments that don't support ICE could still require PRACK. Regards Thomas > > Then we can say that it is ok if something in the answer is > needed for > the offerer to demux incoming media. > > > One issue is what the WebRTC gateway will do if it gets > media before the > > 183. If it just forwards it on, then it will be dropped by the > > browser until the 183 shows up and setRemoteDescription is called. > > Should it buffer it until the 183 arrives? > > My proposal is that it should not transmit media until it knows the > answer has been received. I don't care how it achieves that, but I > imagine dropping it would be a good choice. > > Or, if people prefer, we could allow it to be sent, but allow > the other > end to drop it. But still expect the early answer so that the period > when media is lost is brief. > > > > But I was suggesting that we couple a requirement for > PRACK with BUNDLE, > > > and say that media should not be sent until the PRACK is > received. So > > > then there won't be clipping at all. > > > > [BA] Personally, I don't see PRACK as being required for BUNDLE, at > > least in WebRTC uses. However, a WebRTC/SIP gateway probably should > > support PRACK. > > PRACK wouldn't be required in JSEP. But the equivalent would > be expected > - a quick ANSWER, before media is sent. > > Thanks, > Paul > > _______________________________________________ > mmusic mailing list > mmusic@ietf.org > https://www.ietf.org/mailman/listinfo/mmusic >
- [MMUSIC] Scope of RTP payload types in BUNDLE? Colin Perkins
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Colin Perkins
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Christer Holmberg
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Colin Perkins
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Christer Holmberg
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Colin Perkins
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Cullen Jennings (fluffy)
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Emil Ivov
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Mo Zanaty (mzanaty)
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Cullen Jennings (fluffy)
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Colin Perkins
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Colin Perkins
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Christer Holmberg
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Colin Perkins
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Colin Perkins
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Colin Perkins
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Christer Holmberg
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Colin Perkins
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Colin Perkins
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Colin Perkins
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Cullen Jennings
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Cullen Jennings
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Cullen Jennings
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Cullen Jennings
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Cullen Jennings
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Cullen Jennings
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Bernard Aboba
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Magnus Westerlund
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Christer Holmberg
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Christer Holmberg
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Cullen Jennings
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Cullen Jennings
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Cullen Jennings
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Bernard Aboba
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Bernard Aboba
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Cullen Jennings
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Cullen Jennings
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Bernard Aboba
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Bernard Aboba
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Cullen Jennings
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Cullen Jennings
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? DRAGE, Keith (Keith)
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Stach, Thomas
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Stach, Thomas
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Cullen Jennings
- Re: [MMUSIC] Scope of RTP payload types in BUNDLE? Paul Kyzivat