Re: [rtcweb] Plan for MTI video codec?
Randell Jesup <randell-ietf@jesup.org> Fri, 24 October 2014 05:11 UTC
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Date: Fri, 24 Oct 2014 01:11:08 -0400
From: Randell Jesup <randell-ietf@jesup.org>
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Subject: Re: [rtcweb] Plan for MTI video codec?
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On 10/20/2014 3:09 AM, Cavigioli, Chris wrote: > > No, not 2 discussions ... but 2 MTI codecs. > > Given: > > -Industry is polarized c. 40% VP8 vs. c. 40% H.264 > > -Unlikely this will change > > -Every single mobile device (100%) of the billions out there running a > mobile OS (iOS, Android, Windows, BB OS, etc) will already support > H.264, AMR-xx since those are MTI for 3GPP and for the OS > > Then: > > -Why not support both: VP8, Opus = web; H.264, AMR/AMR-WB = LTE > > -Every single mobile device and OS already deals with H.264+AMR > licensing for many years. > > -Being royalty free, incrementally adding VP8 and Opus shouldn't be a > major additional impact > I should note that many H.264 HW implementations (or the software driving them) in mobile devices are NOT usable for WebRTC (or for video communication in general). The bugs I've seen..... <shudder>. You can certify specific sets of hardware or base chipset code, but until they actually get tested *well* in interactive, error-recovery, variable bandwidth use you have no clue if they'll work. (And without such testing, generally the answer would be 'no'). Can you say "IDR to change bitrate"? Learn.... OMX has *many* options, most of which are not supported on a given implementation, which makes generic use 'interesting' when you go past the well-traveled (and still rocky) decode path. So if Mozilla distributes Firefox to Android devices, what are we to do? We can't simply assume the encoder/decoder will work for WebRTC at this point. Even getting streaming video decode to leverage HW decoders was a massive pain with whitelists, blacklists, evil device-specific hacks, etc. It has gotten better over time - but not great. I'll note that for WebRTC we currently support OpenH264 on desktop, and HW H.264 on specific FxOS devices/chipsets/versions (the default for FxOS WebRTC OMX H.264 support is false). As of today we support only VP8 on Android. And I'll echo Bernard's comments about AMR and licensing/open APIs. <gripe> When did people forget how to edit out irrelevant repetition of old messages? Ah, yes, when everyone started top-replying.... </gripe> Makes searching archives much less fun. :-/ -- Randell Jesup -- rjesup a t mozilla d o t com
- [rtcweb] Plan for MTI video codec? Victor Pascual Avila
- Re: [rtcweb] Plan for MTI video codec? Victor Pascual Avila
- Re: [rtcweb] Plan for MTI video codec? Ted Hardie
- Re: [rtcweb] Plan for MTI video codec? Bernard Aboba
- Re: [rtcweb] Plan for MTI video codec? Matthew Kaufman
- Re: [rtcweb] Plan for MTI video codec? Martin Thomson
- Re: [rtcweb] Plan for MTI video codec? Peter Saint-Andre - &yet
- Re: [rtcweb] Plan for MTI video codec? Bernard Aboba
- Re: [rtcweb] Plan for MTI video codec? Cavigioli, Chris
- Re: [rtcweb] Plan for MTI video codec? Makaraju, Maridi Raju (Raju)
- Re: [rtcweb] Plan for MTI video codec? Roman Shpount
- Re: [rtcweb] Plan for MTI video codec? DRAGE, Keith (Keith)
- Re: [rtcweb] Plan for MTI video codec? Harald Alvestrand
- Re: [rtcweb] Plan for MTI video codec? Alexandre GOUAILLARD
- [rtcweb] VP8 in ISO (Re: Plan for MTI video codec… Harald Alvestrand
- Re: [rtcweb] VP8 in ISO (Re: Plan for MTI video c… Alexandre GOUAILLARD
- Re: [rtcweb] Plan for MTI video codec? Jonathan Rosenberg
- Re: [rtcweb] Plan for MTI video codec? Bernard Aboba
- Re: [rtcweb] Plan for MTI video codec? Alexandre GOUAILLARD
- Re: [rtcweb] Plan for MTI video codec? Watson Ladd
- Re: [rtcweb] Plan for MTI video codec? Jeremy Laurenson (jlaurens)
- Re: [rtcweb] Plan for MTI video codec? Jonathan Rosenberg
- Re: [rtcweb] Plan for MTI video codec? Alexandre GOUAILLARD
- [rtcweb] Scheduling a separate slot for MTI VC Di… Emil Ivov
- Re: [rtcweb] Plan for MTI video codec? Bernard Aboba
- Re: [rtcweb] Plan for MTI video codec? Harald Alvestrand
- Re: [rtcweb] Plan for MTI video codec? Bernard Aboba
- Re: [rtcweb] Plan for MTI video codec? Stephan Wenger
- Re: [rtcweb] Plan for MTI video codec? Cavigioli, Chris
- Re: [rtcweb] Plan for MTI video codec? Ron
- Re: [rtcweb] Plan for MTI video codec? Ca By
- Re: [rtcweb] Plan for MTI video codec? Justin Uberti
- Re: [rtcweb] Plan for MTI video codec? Victor Pascual
- Re: [rtcweb] Plan for MTI video codec? Cavigioli, Chris
- Re: [rtcweb] Plan for MTI video codec? Barry Dingle
- Re: [rtcweb] Plan for MTI video codec? DRAGE, Keith (Keith)
- Re: [rtcweb] Plan for MTI video codec? Martin Thomson
- Re: [rtcweb] Plan for MTI video codec? Andrew Allen
- Re: [rtcweb] Plan for MTI video codec? DRAGE, Keith (Keith)
- Re: [rtcweb] Plan for MTI video codec? Justin Uberti
- Re: [rtcweb] Plan for MTI video codec? Roman Shpount
- Re: [rtcweb] Plan for MTI video codec? Iñaki Baz Castillo
- Re: [rtcweb] Plan for MTI video codec? Barry Dingle
- Re: [rtcweb] Plan for MTI video codec? Bernard Aboba
- Re: [rtcweb] Plan for MTI video codec? Victor Pascual
- Re: [rtcweb] Plan for MTI video codec? Harald Alvestrand
- Re: [rtcweb] Plan for MTI video codec? Olle E. Johansson
- Re: [rtcweb] Plan for MTI video codec? DRAGE, Keith (Keith)
- Re: [rtcweb] Plan for MTI video codec? Ted Hardie
- Re: [rtcweb] Plan for MTI video codec? Stephan Wenger
- Re: [rtcweb] Plan for MTI video codec? Mohammed Raad
- Re: [rtcweb] Plan for MTI video codec? Cavigioli, Chris
- Re: [rtcweb] Plan for MTI video codec? Leon Geyser
- Re: [rtcweb] Plan for MTI video codec? Iñaki Baz Castillo
- Re: [rtcweb] Plan for MTI video codec? Ted Hardie
- Re: [rtcweb] Plan for MTI video codec? Stephan Wenger
- Re: [rtcweb] Plan for MTI video codec? Randell Jesup
- Re: [rtcweb] Plan for MTI video codec? Adam Roach
- Re: [rtcweb] Plan for MTI video codec? Cavigioli, Chris
- Re: [rtcweb] Plan for MTI video codec? Florian Weimer
- Re: [rtcweb] Plan for MTI video codec? markus.isomaki
- Re: [rtcweb] Plan for MTI video codec? Roman Shpount
- Re: [rtcweb] Plan for MTI video codec? Ron
- Re: [rtcweb] Plan for MTI video codec? markus.isomaki
- Re: [rtcweb] Plan for MTI video codec? Mohammed Raad
- Re: [rtcweb] Plan for MTI video codec? Ron