Re: [rtcweb] Is there room for a compromise? what about no MTI?
tim panton <tim@phonefromhere.com> Tue, 14 January 2014 20:56 UTC
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From: tim panton <tim@phonefromhere.com>
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References: <CABcZeBNx5wpKDgd6TgA9U3_nxEKXdCsXpo8Kp663yQ6e_iN9vQ@mail.gmail.com> <20131215075757.GB3245@audi.shelbyville.oz> <52AE54F8.5070300@bbs.darktech.org> <CABcZeBNqE25O+BNLboXDrJ1ypp26uRAw8ehwtyor9gJccpuzGw@mail.gmail.com> <52AE759C.7020209@bbs.darktech.org> <CABcZeBMjTGs41t7y=xvaLdn4i63HxC2YQUkrd-itq=VkuKvpTA@mail.gmail.com> <52AE9129.8090702@bbs.darktech.org> <CABcZeBPOxqa2YQxOrTp9sVF-tQrpg-Kn=CbazBXOx_9dajhUZA@mail.gmail.com> <52AE9E0C.9060707@bbs.darktech.org> <20131216170820.GD82971@verdi> <20131220113631.GA70585@verdi> <52B47196.6060400@bbs.darktech.org> <D5B39658-5766-4C5B-9090-8E8EDC4BCFA6@apple.com> <52B484AB.5020102@bbs.darktech.org> <CAOJ7v-0QcMsZ+nxG+kP99zE-+VUiFesGh05agwsnmaMCapJSmA@mail.gmail.com> <52B4B85F.2070209@dcrocker.net> <CAOJ7v-21zRcW=mRdec+92qNikUFZNi_UqHqvFpOfC7-MAjvY=w@mail.gmail.com> <52B73B81.6050400@dcrocker.net> <CABcZeBM8P==y_tXrNp-Rxe5unXyJJatY-ONbhCfkGPwi0bCQBg@mail.gmail.com>
To: Eric Rescorla <ekr@rtfm.com>
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Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>, Dave Crocker <dcrocker@bbiw.net>
Subject: Re: [rtcweb] Is there room for a compromise? what about no MTI?
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Date: Tue, 14 Jan 2014 20:56:17 -0000
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On 22 Dec 2013, at 22:28, Eric Rescorla <ekr@rtfm.com> wrote: > > > To take a simple example, a number of phones do not have front-facing > cameras and also have processors that are incapable of doing an > adequate video call (especially if we select a codec for which they > don't have adequate hardware support). In that case, it might be > reasonable to simply not offer video at all on such devices. In such > a case, would it really make sense to call such devices non-compliant > for not implementing an MTI video codec that they wouldn't negotiate > in any case? That’s a whole set of assumptions that the browser vendor is loading on very little data. - So just because there is no forward facing camera we assume there will be no possible webRTC video usage ? - I disagree - it may not do for the classic f2f call, but I’ve seen plenty of show-and tell use cases where the rear cam is the one sending video. As for the incapable hardware example, again there are plenty of 1 way video call cases (think amazon mayday), the hardware may be able to decode something it can’t encode. As I noted a while back SDP OA is clumsy at expressing these asymmetrical nuances, but I’ve been assured it is possible. Also I notice that the Raspberry Pi which has h264 in silicon has recently started supporting VP8 by using the GPU to accelerate some of the encode operations. - An example a device that seems not to support a given codec, but with a firmware upgrade can. It would be a shame if (for example) firefox on the Pi didn’t offer webRTC video just because at some point one of the devs had had a Pi with no camera module or where VP8 was too slow. ;tldr - We need to leave these decisions to app developers and not assume anything we don’t absolutely have to. Tim.
- [rtcweb] Cisco to open source its H.264 implement… Jonathan Rosenberg (jdrosen)
- Re: [rtcweb] Cisco to open source its H.264 imple… Karl Stahl
- Re: [rtcweb] Cisco to open source its H.264 imple… Leon Geyser
- Re: [rtcweb] Cisco to open source its H.264 imple… Matt Fredrickson
- Re: [rtcweb] Cisco to open source its H.264 imple… Jonathan Rosenberg
- Re: [rtcweb] Cisco to open source its H.264 imple… Peter Thatcher
- Re: [rtcweb] Cisco to open source its H.264 imple… Matt Fredrickson
- Re: [rtcweb] Cisco to open source its H.264 imple… Adam Roach
- Re: [rtcweb] Cisco to open source its H.264 imple… Adam Roach
- Re: [rtcweb] Cisco to open source its H.264 imple… Ted Hardie
- Re: [rtcweb] Cisco to open source its H.264 imple… Lorenzo Miniero
- Re: [rtcweb] Cisco to open source its H.264 imple… Adam Roach
- Re: [rtcweb] Cisco to open source its H.264 imple… Ethan Hugg
- Re: [rtcweb] Cisco to open source its H.264 imple… Monty Montgomery
- Re: [rtcweb] Cisco to open source its H.264 imple… Monty Montgomery
- Re: [rtcweb] Cisco to open source its H.264 imple… Lorenzo Miniero
- Re: [rtcweb] Cisco to open source its H.264 imple… Max Jonas Werner
- Re: [rtcweb] Cisco to open source its H.264 imple… Matt Fredrickson
- Re: [rtcweb] Cisco to open source its H.264 imple… Ted Hardie
- Re: [rtcweb] Cisco to open source its H.264 imple… Cullen Jennings (fluffy)
- Re: [rtcweb] Cisco to open source its H.264 imple… Jonathan Rosenberg
- Re: [rtcweb] Cisco to open source its H.264 imple… Cullen Jennings (fluffy)
- Re: [rtcweb] Cisco to open source its H.264 imple… Matt Fredrickson
- Re: [rtcweb] Cisco to open source its H.264 imple… Steve Sokol
- Re: [rtcweb] Cisco to open source its H.264 imple… Leon Geyser
- Re: [rtcweb] Cisco to open source its H.264 imple… Matt Fredrickson
- Re: [rtcweb] Cisco to open source its H.264 imple… Jonathan Rosenberg
- Re: [rtcweb] Cisco to open source its H.264 imple… Adam Roach
- Re: [rtcweb] Cisco to open source its H.264 imple… Jeremy Laurenson (jlaurens)
- Re: [rtcweb] Cisco to open source its H.264 imple… Cullen Jennings (fluffy)
- Re: [rtcweb] Cisco to open source its H.264 imple… Göran Eriksson AP
- Re: [rtcweb] Cisco to open source its H.264 imple… Jeremy Laurenson (jlaurens)
- Re: [rtcweb] Cisco to open source its H.264 imple… Lorenzo Miniero
- Re: [rtcweb] Cisco to open source its H.264 imple… Cullen Jennings (fluffy)
- Re: [rtcweb] Cisco to open source its H.264 imple… DRAGE, Keith (Keith)
- Re: [rtcweb] Cisco to open source its H.264 imple… cowwoc
- Re: [rtcweb] Cisco to open source its H.264 imple… Lorenzo Miniero
- Re: [rtcweb] Cisco to open source its H.264 imple… David Singer
- Re: [rtcweb] Cisco to open source its H.264 imple… cowwoc
- Re: [rtcweb] Cisco to open source its H.264 imple… Paul Giralt
- Re: [rtcweb] Cisco to open source its H.264 imple… Cullen Jennings (fluffy)
- Re: [rtcweb] Cisco to open source its H.264 imple… Ron
- Re: [rtcweb] Cisco to open source its H.264 imple… Paul Giralt
- Re: [rtcweb] Cisco to open source its H.264 imple… Leon Geyser
- Re: [rtcweb] Cisco to open source its H.264 imple… Kaiduan Xie
- Re: [rtcweb] Cisco to open source its H.264 imple… Cullen Jennings
- Re: [rtcweb] Cisco to open source its H.264 imple… cowwoc
- Re: [rtcweb] Cisco to open source its H.264 imple… Ron
- Re: [rtcweb] Cisco to open source its H.264 imple… Cullen Jennings
- Re: [rtcweb] Cisco to open source its H.264 imple… Ron
- Re: [rtcweb] Cisco to open source its H.264 imple… Roman Shpount
- Re: [rtcweb] Cisco to open source its H.264 imple… Cullen Jennings (fluffy)
- Re: [rtcweb] Cisco to open source its H.264 imple… Cullen Jennings
- Re: [rtcweb] Cisco to open source its H.264 imple… Cullen Jennings
- [rtcweb] VP8 binary module (Was: Cisco to open so… cowwoc
- Re: [rtcweb] Cisco to open source its H.264 imple… Roman Shpount
- Re: [rtcweb] Cisco to open source its H.264 imple… Ron
- Re: [rtcweb] Cisco to open source its H.264 imple… Ron
- Re: [rtcweb] VP8 binary module (Was: Cisco to ope… Kaiduan Xie
- Re: [rtcweb] Cisco to open source its H.264 imple… Ron
- Re: [rtcweb] Cisco to open source its H.264 imple… Roman Shpount
- Re: [rtcweb] Cisco to open source its H.264 imple… Engel Nyst
- Re: [rtcweb] Cisco to open source its H.264 imple… Daniel-Constantin Mierla
- Re: [rtcweb] Cisco to open source its H.264 imple… cowwoc
- Re: [rtcweb] Cisco to open source its H.264 imple… Stephan Wenger
- Re: [rtcweb] VP8 binary module (Was: Cisco to ope… Bjoern Hoehrmann
- Re: [rtcweb] Cisco to open source its H.264 imple… Adam Roach
- Re: [rtcweb] Cisco to open source its H.264 imple… Ron
- Re: [rtcweb] VP8 binary module (Was: Cisco to ope… Justin Uberti
- Re: [rtcweb] Cisco to open source its H.264 imple… Daniel-Constantin Mierla
- Re: [rtcweb] Cisco to open source its H.264 imple… Ron
- Re: [rtcweb] Cisco to open source its H.264 imple… DRAGE, Keith (Keith)
- Re: [rtcweb] Cisco to open source its H.264 imple… Cullen Jennings
- Re: [rtcweb] Cisco to open source its H.264 imple… Cullen Jennings
- Re: [rtcweb] Cisco to open source its H.264 imple… Jack Moffitt
- Re: [rtcweb] Cisco to open source its H.264 imple… Engel Nyst
- Re: [rtcweb] Cisco to open source its H.264 imple… Mo Zanaty (mzanaty)
- [rtcweb] H.264 IPR disclosures (or persistent lac… Ron
- Re: [rtcweb] Cisco to open source its H.264 imple… Ron
- Re: [rtcweb] Cisco to open source its H.264 imple… Basil Mohamed Gohar
- Re: [rtcweb] H.264 IPR disclosures (or persistent… DRAGE, Keith (Keith)
- Re: [rtcweb] Cisco to open source its H.264 imple… Engel Nyst
- Re: [rtcweb] Cisco to open source its H.264 imple… Mo Zanaty (mzanaty)
- Re: [rtcweb] H.264 IPR disclosures (or persistent… Ron
- Re: [rtcweb] Cisco to open source its H.264 imple… Ron
- Re: [rtcweb] Cisco to open source its H.264 imple… Gili
- Re: [rtcweb] H.264 IPR disclosures (or persistent… Mo Zanaty (mzanaty)
- Re: [rtcweb] H.264 IPR disclosures (or persistent… SM
- Re: [rtcweb] Cisco to open source its H.264 imple… Mo Zanaty (mzanaty)
- [rtcweb] H.264's high-low play (Was: H.264 IPR di… cowwoc
- Re: [rtcweb] H.264 IPR disclosures (or persistent… Mo Zanaty (mzanaty)
- Re: [rtcweb] H.264 IPR disclosures (or persistent… Markus.Isomaki
- Re: [rtcweb] H.264 IPR disclosures (or persistent… DRAGE, Keith (Keith)
- Re: [rtcweb] H.264 IPR disclosures (or persistent… Ron
- Re: [rtcweb] H.264 IPR disclosures (or persistent… Lorenzo Miniero
- Re: [rtcweb] H.264 IPR disclosures (or persistent… Ron
- Re: [rtcweb] H.264 IPR disclosures (or persistent… SM
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… bryandonnovan
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… Eric Rescorla
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… bryandonnovan
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… Eric Rescorla
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… Silvia Pfeiffer
- [rtcweb] Hermetic builds (Re: Cisco to open sourc… Harald Alvestrand
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… cowwoc
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… Eric Rescorla
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… Jeremy Laurenson (jlaurens)
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… Basil Mohamed Gohar
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… Dave Crocker
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… DRAGE, Keith (Keith)
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… Ron
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… Basil Mohamed Gohar
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… Roman Shpount
- Re: [rtcweb] H.264 IPR disclosures (or persistent… DRAGE, Keith (Keith)
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… cowwoc
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… Eric Rescorla
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… Adam Roach
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… cowwoc
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… Eric Rescorla
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… cowwoc
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… Eric Rescorla
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… cowwoc
- Re: [rtcweb] H.264 IPR disclosures (or persistent… Harald Alvestrand
- Re: [rtcweb] H.264's high-low play (Was: H.264 IP… Harald Alvestrand
- Re: [rtcweb] VP8 binary module (Was: Cisco to ope… Harald Alvestrand
- Re: [rtcweb] H.264 IPR disclosures (or persistent… Bjoern Hoehrmann
- Re: [rtcweb] H.264 IPR disclosures (or persistent… Harald Alvestrand
- Re: [rtcweb] Hermetic builds (Re: Cisco to open s… Bjoern Hoehrmann
- [rtcweb] Is there room for a compromise? John Leslie
- Re: [rtcweb] Hermetic builds (Re: Cisco to open s… Ron
- Re: [rtcweb] Is there room for a compromise? cowwoc
- Re: [rtcweb] Hermetic builds (Re: Cisco to open s… Randell Jesup
- Re: [rtcweb] Is there room for a compromise? John Leslie
- Re: [rtcweb] Is there room for a compromise? cowwoc
- Re: [rtcweb] Is there room for a compromise? what… David Singer
- Re: [rtcweb] Is there room for a compromise? what… cowwoc
- Re: [rtcweb] Is there room for a compromise? Ron
- Re: [rtcweb] Is there room for a compromise? what… Justin Uberti
- Re: [rtcweb] Is there room for a compromise? what… Dave Crocker
- Re: [rtcweb] Is there room for a compromise? Matthew Kaufman (SKYPE)
- Re: [rtcweb] Is there room for a compromise? Ron
- Re: [rtcweb] Is there room for a compromise? cowwoc
- Re: [rtcweb] Is there room for a compromise? Matthew Kaufman (SKYPE)
- Re: [rtcweb] Is there room for a compromise? Jack Moffitt
- Re: [rtcweb] Is there room for a compromise? John Leslie
- Re: [rtcweb] Is there room for a compromise? what… Bernard Aboba
- Re: [rtcweb] Is there room for a compromise? what… Ron
- Re: [rtcweb] Interoperability - what have we lear… Bernard Aboba
- Re: [rtcweb] Interoperability - what have we lear… Ron
- Re: [rtcweb] Is there room for a compromise? what… Martin Thomson
- Re: [rtcweb] Is there room for a compromise? what… Justin Uberti
- Re: [rtcweb] Is there room for a compromise? what… Eric Rescorla
- Re: [rtcweb] Interoperability - what have we lear… Bernard Aboba
- Re: [rtcweb] Interoperability - what have we lear… Colin Perkins
- Re: [rtcweb] Is there room for a compromise? what… Dave Crocker
- Re: [rtcweb] Is there room for a compromise? what… Eric Rescorla
- Re: [rtcweb] Is there room for a compromise? what… Dave Crocker
- Re: [rtcweb] Is there room for a compromise? what… Bjoern Hoehrmann
- Re: [rtcweb] Is there room for a compromise? what… Eric Rescorla
- Re: [rtcweb] Is there room for a compromise? what… Ron
- Re: [rtcweb] Is there room for a compromise? what… Bjoern Hoehrmann
- Re: [rtcweb] Is there room for a compromise? what… Eric Rescorla
- Re: [rtcweb] Is there room for a compromise? what… Dave Crocker
- Re: [rtcweb] Is there room for a compromise? what… Ron
- Re: [rtcweb] Is there room for a compromise? what… Richard Shockey
- Re: [rtcweb] Interoperability - what have we lear… Bernard Aboba
- Re: [rtcweb] Is there room for a compromise? what… tim panton
- Re: [rtcweb] Is there room for a compromise? what… Martin Thomson