- Monday, November 2, 2015

netvc@jabber.ietf.org

Monday, November 2, 2015< ^ >

Kagami has set the subject to: NETVC -- IETF 93 -- Agenda: https://datatracker.ietf.org/meeting/93/agenda/netvc/ -- Opus: http://congresshall3.conf.meetecho.com:8000/congresshall3.opus -- MP3: http://ietf93streaming.dnsalias.net/ietf/ietf935.m3u -- Meetecho: http://www.meetecho.com/ietf93/netvc_II -- Slides: https://datatracker.ietf.org/meeting/93/materials.html -- Logs: https://www.ietf.org/jabber/logs/netvc/ -- Mailing-list: https://mailarchive.ietf.org/arch/browse/video-codec/ -- Monday session: http://recordings.conf.meetecho.com/Playout/watch.jsp?recording=IETF93_NETVC&chapter=chapter_1

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[06:19:48] <Meetecho> just as a FYI for remote attendees, if you have any issue with remote audio or video, just mention us and we'll be automatically alerted so that we can look into it
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[06:22:51] <Martin Dürst> I'll look out for comments from remote commenters, so please ping me if you have some.
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[06:24:19] <Martin Dürst> (i.e. make sure your comment is somehow marked, so that I can distinguish between side remarks and stuff you actually want me to say)
[06:24:33] <Martin Dürst> Jose Alvarez up, talking about requirements
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[06:26:48] <Martin Dürst> link to document: https://www.ietf.org/proceedings/94/slides/slides-94-netvc-1.pdf
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[06:36:15] <Maire Reavy> mic: (from an earlier slide) I'm concerned even 100ms will be too high for real-time use. There can be slower modes (for non-real-time use cases) but 30ms (or less) for real-time needs to be the upper bound
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[06:38:20] <Martin Dürst> Maire: got your comment, looking for the best timing to say it
[06:38:28] <Maire Reavy> thanks!
[06:39:26] <Martin Dürst> you're welcome
[06:46:50] <Thomas Davies> mic: what does support of HDR mean in practice? if you can do 10/12 bit, then with a mapping function and suitable metadata then you can do some form of HDR.
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[06:54:48] <Maire Reavy> yes, adopt as basis
[06:56:23] <Martin Dürst> Now looking at https://www.ietf.org/proceedings/94/slides/slides-94-netvc-2.pdf
[06:56:49] <Thomas Davies_7975> mic: what about frame rate? 60Hz does not require 2x the bit rate of 30 Hz
[06:57:58] <Thomas Davies_7975> sqrt is ok for framerate
[06:58:15] <Jonathan Lennox> Thomas Davies: Was that for the mic too?
[06:58:20] <Thomas Davies_7975> yes
[07:03:02] <Thomas Davies_7975> mic: Main comment. The draft does not state what the testing is for and what the best test methodology might be for each purpose. Can you clarify the purposes you have in mind? What you might do for final testing is different for what you might do for testing a tool for inclusion, for example. This draft seems aimed at final testing rather than the process of developing the codec. I'm concerned about sucking away a lot of effort into developing fancy 2-pass encoding methods and rate controls that don't improve the fundamental technologies at all, when we are doing tests just for deciding on tools and judging current progress. Really want to constrain adaptivity to make fair comparisons between different codecs, also.
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[07:12:39] <Maire Reavy> yes, adopt
[07:17:41] <Martin Dürst> Not at page 5 of https://www.ietf.org/proceedings/94/slides/slides-94-netvc-3.pdf
[07:17:50] <Martin Dürst> s/Not/Now/
[07:33:18] <Thomas Davies_7975> mic: have you tried running the filter on a subset of frames (e.g. HQ frames in a frame hierarchy)? would reduce complexity
[07:34:19] <Thomas Davies_7975> mic: e.g. do it on every 4th frame, to reduce complexity
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[07:43:57] <Martin Dürst> meeting over
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[07:44:55] <Kagami> Thank you for coverage of the event, Martin Dürst
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[07:47:18] <Thomas Davies> thanks Martin
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