Re: [rtcweb] About defining a signaling protocol for WebRTC (or not)
Harald Alvestrand <harald@alvestrand.no> Sun, 18 September 2011 08:07 UTC
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Date: Sun, 18 Sep 2011 10:09:20 +0200
From: Harald Alvestrand <harald@alvestrand.no>
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To: Matthew Kaufman <matthew.kaufman@skype.net>
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Cc: rtcweb@ietf.org
Subject: Re: [rtcweb] About defining a signaling protocol for WebRTC (or not)
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On 09/16/2011 11:12 PM, Matthew Kaufman wrote: > On 9/15/11 3:09 PM, Harald Alvestrand wrote: >> The disadvantage of parsing to another structure (I am fond of JSON >> myself) is that one has to maintain a data definition for the format >> being parsed to, a defined transform between that and the "canonical >> SDP structure" has to be implemented in user space when one does SDP >> interoperability, both of those have to be updated for every SDP >> extension that someone defines somewhere, and one is still not free >> to define extensions on the non-SDP side if one still requires the >> ability to map them into SDP. >> >> If one uses the "native" SDP format, which is the format in which >> every extension to the format gets documented, the browsers are the >> ones who *have* to parse it (although others are likely to). > > Of course what you're also saying here is that it takes a trip to the > IETF to make every extension. So if the *only* Javascript API for > controlling the codec (or getting its capabilities by triggering an > offer) is a pile of SDP in string form, then nothing that hasn't been > standardized can be described. 1) No reason that this should be the only interface. I've just argued that I think this interface needs to be supported 2) SDP has a relatively clean "ignore what you don't understand" extension model. It's not my impression that people who want to deploy stuff wait until the standards are done. > > For example: forcing the Opus codec to "music" mode no matter what the > input. I haven't seen the definitions for signalling Opus in SDP, so don't know if such a capability is described there (which may or may not illustrate your point). > > Matthew Kaufman > >
- Re: [rtcweb] About defining a signaling protocol … Bernard Aboba
- [rtcweb] About defining a signaling protocol for … Iñaki Baz Castillo
- Re: [rtcweb] About defining a signaling protocol … Henry Sinnreich
- Re: [rtcweb] About defining a signaling protocol … Roman Shpount
- Re: [rtcweb] About defining a signaling protocol … Victor Pascual
- Re: [rtcweb] About defining a signaling protocol … Prakash
- Re: [rtcweb] About defining a signaling protocol … Saúl Ibarra Corretgé
- [rtcweb] About defining a signaling protocol for … gao.yang2
- Re: [rtcweb] About defining a signaling protocol … Avasarala, Ranjit
- Re: [rtcweb] About defining a signaling protocol … Matthew Kaufman
- Re: [rtcweb] About defining a signaling protocol … Ravindran Parthasarathi
- Re: [rtcweb] About defining a signaling protocol … Soo-Hyun Choi
- Re: [rtcweb] About defining a signaling protocol … José Luis Millán
- Re: [rtcweb] About defining a signaling protocol … Saúl Ibarra Corretgé
- Re: [rtcweb] About defining a signaling protocol … Iñaki Baz Castillo
- Re: [rtcweb] About defining a signaling protocol … Tim Panton
- Re: [rtcweb] About defining a signaling protocol … Iñaki Baz Castillo
- Re: [rtcweb] About defining a signaling protocol … Lorenzo Miniero
- Re: [rtcweb] About defining a signaling protocol … Iñaki Baz Castillo
- Re: [rtcweb] About defining a signaling protocol … Harald Alvestrand
- Re: [rtcweb] About defining a signaling protocol … Henry Sinnreich
- [rtcweb] RTCWeb default signaling protocol [was R… Ravindran Parthasarathi
- Re: [rtcweb] RTCWeb default signaling protocol [w… Roman Shpount
- Re: [rtcweb] RTCWeb default signaling protocol [w… Hadriel Kaplan
- Re: [rtcweb] RTCWeb default signaling protocol [w… Jim McEachern
- Re: [rtcweb] RTCWeb default signaling protocol [w… Avasarala, Ranjit
- Re: [rtcweb] RTCWeb default signaling protocol [w… Saúl Ibarra Corretgé
- Re: [rtcweb] RTCWeb default signaling protocol [w… Saúl Ibarra Corretgé
- Re: [rtcweb] RTCWeb default signaling protocol [w… Muthu Arul Mozhi Perumal (mperumal)
- Re: [rtcweb] RTCWeb default signaling protocol [w… Iñaki Baz Castillo
- Re: [rtcweb] RTCWeb default signaling protocol [w… Iñaki Baz Castillo
- Re: [rtcweb] RTCWeb default signaling protocol [w… Tim Panton
- [rtcweb] SDP offer/answer vs. JSON (was: About de… Hadriel Kaplan
- Re: [rtcweb] RTCWeb default signaling protocol [w… Ted Hardie
- Re: [rtcweb] RTCWeb default signaling protocol [w… cbran
- Re: [rtcweb] RTCWeb default signaling protocol [w… Hadriel Kaplan
- Re: [rtcweb] RTCWeb default signaling protocol [w… Stephan Wenger
- Re: [rtcweb] RTCWeb default signaling protocol [w… Matthew Kaufman
- Re: [rtcweb] About defining a signaling protocol … Matthew Kaufman
- Re: [rtcweb] RTCWeb default signaling protocol [w… Matthew Kaufman
- Re: [rtcweb] ICE and security Olle E. Johansson
- Re: [rtcweb] RTCWeb default signaling protocol [w… Olle E. Johansson
- Re: [rtcweb] ICE and security Dzonatas Sol
- Re: [rtcweb] ICE and security Hadriel Kaplan
- Re: [rtcweb] RTCWeb default signaling protocol [w… Hadriel Kaplan
- Re: [rtcweb] ICE and security Dzonatas Sol
- Re: [rtcweb] ICE and security Eric Rescorla
- Re: [rtcweb] About defining a signaling protocol … Harald Alvestrand
- Re: [rtcweb] ICE and security Harald Alvestrand
- Re: [rtcweb] About defining a signaling protocol … Timothy B. Terriberry
- Re: [rtcweb] ICE and security Dzonatas Sol
- Re: [rtcweb] RTCWeb default signaling protocol [w… Ravindran Parthasarathi
- Re: [rtcweb] RTCWeb default signaling protocol [w… Randell Jesup
- Re: [rtcweb] RTCWeb default signaling protocol [w… Randell Jesup
- Re: [rtcweb] RTCWeb default signaling protocol [w… José Luis Millán
- Re: [rtcweb] RTCWeb default signaling protocol [w… Hadriel Kaplan
- Re: [rtcweb] RTCWeb default signaling protocol [w… Markus.Isomaki
- Re: [rtcweb] RTCWeb default signaling protocol [w… Randell Jesup
- Re: [rtcweb] ICE and security Dan Wing
- Re: [rtcweb] RTCWeb default signaling protocol [w… Olle E. Johansson
- Re: [rtcweb] RTCWeb default signaling protocol [w… Iñaki Baz Castillo
- Re: [rtcweb] RTCWeb default signaling protocol [w… Randell Jesup
- Re: [rtcweb] RTCWeb default signaling protocol [w… Eric Rescorla
- Re: [rtcweb] SDP offer/answer vs. JSON (was: Abou… Henry Sinnreich
- Re: [rtcweb] RTCWeb default signaling protocol [w… Jim McEachern
- Re: [rtcweb] RTCWeb default signaling protocol [w… Randell Jesup
- Re: [rtcweb] RTCWeb default signaling protocol [w… Saúl Ibarra Corretgé
- Re: [rtcweb] SDP offer/answer vs. JSON Magnus Westerlund
- [rtcweb] Data Transport, was: Re: RTCWeb default … Magnus Westerlund
- Re: [rtcweb] RTCWeb default signaling protocol [w… Igor Faynberg
- Re: [rtcweb] Data Transport, was: Re: RTCWeb defa… Olle E. Johansson
- Re: [rtcweb] Data Transport, was: Re: RTCWeb defa… Timothy B. Terriberry
- Re: [rtcweb] RTCWeb default signaling protocol [w… Dzonatas Sol
- Re: [rtcweb] RTCWeb default signaling protocol [w… Randell Jesup
- Re: [rtcweb] RTCWeb default signaling protocol [w… Randell Jesup
- Re: [rtcweb] Data Transport, was: Re: RTCWeb defa… Harald Alvestrand
- Re: [rtcweb] RTCWeb default signaling protocol [w… Saúl Ibarra Corretgé
- Re: [rtcweb] RTCWeb default signaling protocol [w… Randell Jesup
- Re: [rtcweb] RTCWeb default signaling protocol [w… Matthew Kaufman
- Re: [rtcweb] RTCWeb default signaling protocol [w… Roman Shpount
- Re: [rtcweb] RTCWeb default signaling protocol [w… Ravindran Parthasarathi
- Re: [rtcweb] RTCWeb default signaling protocol [w… Hadriel Kaplan
- Re: [rtcweb] RTCWeb default signaling protocol [w… Randell Jesup
- Re: [rtcweb] RTCWeb default signaling protocol [w… Hadriel Kaplan
- Re: [rtcweb] RTCWeb default signaling protocol [w… Saúl Ibarra Corretgé
- Re: [rtcweb] RTCWeb default signaling protocol [w… Randell Jesup
- Re: [rtcweb] RTCWeb default signaling protocol [w… Iñaki Baz Castillo
- Re: [rtcweb] RTCWeb default signaling protocol [w… Hadriel Kaplan
- Re: [rtcweb] RTCWeb default signaling protocol [w… Olle E. Johansson
- Re: [rtcweb] RTCWeb default signaling protocol [w… Ravindran Parthasarathi
- Re: [rtcweb] RTCWeb default signaling protocol [w… Hadriel Kaplan
- Re: [rtcweb] RTCWeb default signaling protocol [w… Olle E. Johansson
- Re: [rtcweb] RTCWeb default signaling protocol [w… Iñaki Baz Castillo
- Re: [rtcweb] RTCWeb default signaling protocol [w… Iñaki Baz Castillo
- Re: [rtcweb] RTCWeb default signaling protocol [w… Ravindran Parthasarathi
- Re: [rtcweb] RTCWeb default signaling protocol [w… José Luis Millán
- Re: [rtcweb] Data Transport, was: Re: RTCWeb defa… Magnus Westerlund
- Re: [rtcweb] RTCWeb default signaling protocol [w… Ted Hardie
- Re: [rtcweb] RTCWeb default signaling protocol [w… Dzonatas Sol
- Re: [rtcweb] SDP offer/answer vs. JSON (was: Abou… Elwell, John
- Re: [rtcweb] SDP offer/answer vs. JSON Dzonatas Sol
- Re: [rtcweb] SDP offer/answer vs. JSON Dzonatas Sol
- Re: [rtcweb] RTCWeb default signaling protocol [w… Henry Sinnreich
- [rtcweb] "20 lines" (Re: RTCWeb default signaling… Harald Alvestrand
- Re: [rtcweb] Data Transport, was: Re: RTCWeb defa… Harald Alvestrand
- Re: [rtcweb] Data Transport, was: Re: RTCWeb defa… Iñaki Baz Castillo
- Re: [rtcweb] Data Transport, was: Re: RTCWeb defa… Iñaki Baz Castillo
- Re: [rtcweb] Data Transport, was: Re: RTCWeb defa… Colin Perkins
- Re: [rtcweb] "20 lines" (Re: RTCWeb default signa… Hadriel Kaplan
- Re: [rtcweb] Data Transport, was: Re: RTCWeb defa… Hadriel Kaplan
- Re: [rtcweb] Data Transport, was: Re: RTCWeb defa… Colin Perkins
- Re: [rtcweb] Data Transport, was: Re: RTCWeb defa… Hadriel Kaplan
- Re: [rtcweb] Data Transport, was: Re: RTCWeb defa… Olle E. Johansson
- Re: [rtcweb] Data Transport, was: Re: RTCWeb defa… Saúl Ibarra Corretgé
- Re: [rtcweb] Data Transport, was: Re: RTCWeb defa… Iñaki Baz Castillo
- Re: [rtcweb] Data Transport, was: Re: RTCWeb defa… Randell Jesup
- [rtcweb] SCTP for data channels in rtcweb Randell Jesup
- Re: [rtcweb] SCTP for data channels in rtcweb Randell Jesup
- Re: [rtcweb] RTCWeb default signaling protocol [w… Ravindran Parthasarathi
- Re: [rtcweb] RTCWeb default signaling protocol [w… Roman Shpount
- Re: [rtcweb] RTCWeb default signaling protocol [w… Iñaki Baz Castillo
- Re: [rtcweb] RTCWeb default signaling protocol [w… Randell Jesup
- Re: [rtcweb] "20 lines" (Re: RTCWeb default signa… Jozsef Vass
- Re: [rtcweb] "20 lines" (Re: RTCWeb default signa… Roman Shpount
- Re: [rtcweb] "20 lines" (Re: RTCWeb default signa… Saúl Ibarra Corretgé
- Re: [rtcweb] "20 lines" (Re: RTCWeb default signa… Iñaki Baz Castillo
- Re: [rtcweb] "20 lines" (Re: RTCWeb default signa… Iñaki Baz Castillo
- Re: [rtcweb] "20 lines" (Re: RTCWeb default signa… Jozsef Vass
- Re: [rtcweb] "20 lines" (Re: RTCWeb default signa… Jozsef Vass
- Re: [rtcweb] "20 lines" (Re: RTCWeb default signa… Iñaki Baz Castillo
- Re: [rtcweb] "20 lines" (Re: RTCWeb default signa… Ravindran Parthasarathi
- Re: [rtcweb] "20 lines" (Re: RTCWeb default signa… Iñaki Baz Castillo
- Re: [rtcweb] "20 lines" (Re: RTCWeb default signa… Ravindran Parthasarathi
- Re: [rtcweb] "20 lines" (Re: RTCWeb default signa… Iñaki Baz Castillo
- Re: [rtcweb] "20 lines" (Re: RTCWeb default signa… Ravindran Parthasarathi
- Re: [rtcweb] "20 lines" (Re: RTCWeb default signa… Saúl Ibarra Corretgé
- Re: [rtcweb] RTCWeb default signaling protocol [w… Ravindran Parthasarathi
- Re: [rtcweb] RTCWeb default signaling protocol [w… Iñaki Baz Castillo
- Re: [rtcweb] RTCWeb default signaling protocol [w… Ravindran Parthasarathi
- Re: [rtcweb] RTCWeb default signaling protocol [w… Saúl Ibarra Corretgé
- Re: [rtcweb] RTCWeb default signaling protocol [w… Tim Panton
- Re: [rtcweb] RTCWeb default signaling protocol [w… Randell Jesup
- Re: [rtcweb] RTCWeb default signaling protocol [w… Eric Rescorla
- Re: [rtcweb] RTCWeb default signaling protocol [w… Jim McEachern
- Re: [rtcweb] RTCWeb default signaling protocol [w… Tim Panton
- Re: [rtcweb] RTCWeb default signaling protocol [w… Bernard Aboba
- Re: [rtcweb] RTCWeb default signaling protocol [w… Cullen Jennings
- Re: [rtcweb] RTCWeb default signaling protocol [w… Matthew Kaufman
- Re: [rtcweb] RTCWeb default signaling protocol [w… Randell Jesup
- Re: [rtcweb] RTCWeb default signaling protocol [w… Matthew Kaufman
- Re: [rtcweb] RTCWeb default signaling protocol [w… Randell Jesup
- Re: [rtcweb] RTCWeb default signaling protocol [w… Cameron Byrne
- Re: [rtcweb] RTCWeb default signaling protocol [w… Ravindran Parthasarathi
- Re: [rtcweb] RTCWeb default signaling protocol [w… Ravindran Parthasarathi
- Re: [rtcweb] RTCWeb default signaling protocol [w… Asveren, Tolga
- Re: [rtcweb] RTCWeb default signaling protocol [w… Saul Ibarra Corretge