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[meig] minutes - 2 April 2019

From: Kazuyuki Ashimura <ashimura@w3.org>
Date: Mon, 8 Apr 2019 00:32:40 +0900
Message-ID: <CAJ8iq9WQW-=B5WGD_4BxjwM-QrJeowTP9aNShNhWqsEW-oK2Lg@mail.gmail.com>
To: public-web-and-tv@w3.org
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also as text below.

Sorry but the sound quality was not great, so clarifications/comments are





      [1] http://www.w3.org/

                               - DRAFT -

                       Media and Entertainment IG

02 Apr 2019


          Kaz_Ashimura, John_Simmons, Kazuhiro_Hoya,
          Louay_Bassbouss, Huang_Zhihao, Matt_Wolenetz,
          Chris_Cunningham, Song_Xu, Mark_Vickers,
          Barbara_Hochgesang, Nigel_Megitt, Hyojin_Song,
          Francois_Daoust, Chris_Poole, Eric_Stobbart, Greg_Meyer,
          Mark_Watson, Tan_Zhaoxin, Vlad, Will_Law, John_Luther





     * [2]Topics
         1. [3]MSE update
     * [4]Summary of Action Items
     * [5]Summary of Resolutions

MSE update

   [6]mse spec

      [6] https://www.w3.org/TR/media-source/

   [7]MSE repo

      [7] https://github.com/WICG/media-source

   [8]MSE issues

      [8] https://github.com/w3c/media-source/issues

   Matt: (give explanation about the background)
   ... discussion new features
   ... please go to the issue tracker and file issues

   <wolenetz> [9]https://github.com/WICG/media-source

      [9] https://github.com/WICG/media-source

   Mark: (shares his screen to share that resource)

   Matt: (explains wicg work)

   [10]issue 155

     [10] https://github.com/w3c/media-source/issues/155

   Matt: this particular issue has been incubated

   [11]diff version

     [11] https://services.w3.org/htmldiff?doc1=https://rawgit.com/W3C/media-source/gh-pages/index.html&doc2=https://rawgit.com/WICG/media-source/codec-switching/index.html

   Matt: current incubation at:


     [12] https://github.com/WICG/media-source/tree/mse-in-workers-using-handle

   [13]issue 175 MediaSource in Worker

     [13] https://github.com/WICG/media-source/tree/mse-in-workers-using-handle

   Matt: one solution would be parallel processing
   ... api extension for MSE
   ... how to attach media source URL
   ... working on demo
   ... looking for folks interested
   ... would love to have more people
   ... a lot of work to happen there
   ... e.g., what is blocking in iOS
   ... also garbage collection
   ... technical blockers for MSE
   ... MSE spec doesn't state concrete way for implementations
   ... so several options for implementations
   ... trying to get better implementation experience
   ... continue discussions
   ... better ability for interoperability
   ... interested to hear your opinions

   Mark: tx
   ... how would you best like people to participate?
   ... what's the best way to participate in the discussion?

   Matt: please comment and keep commenting
   ... if you feel like narrower communication, you can directly
   contact me or Mark Watson
   ... John Simmons as well
   ... would love to have comments

   Mark: any questions?

   Nigel: thinking about object-based
   ... switch between streams

   Matt: maybe a couple of contexts
   ... brief example?

   Nigel: if we got different audio/video content
   ... potential make them together
   ... in a simple case, just switching between those channels
   ... but need without gaps

   Matt: a couple ways
   ... buffering beforehand
   ... another way migh tbe multiple tracks
   ... more than video/audio tracks

   Nigel: another question about content
   ... looks more like data such as subtitles or captions

   Matt: historically implementations are slow
   ... may need intervening time
   ... out of and use

   Nigel: thinking about inband data
   ... an example is dash.js
   ... subtitle on the side and synchronization
   ... different ways to get media

   Matt: can think of several ways
   ... players use JS library
   ... something to discuss for new features

   Nigel: didn't necessarily mean need for native player
   ... possibly JS layer

   Matt: something very specific for some byte stream

   Mark: sounds like an issue for some specific case

   Matt: something to think about

   <Barbara_Intel> Roadmap - Is there a MSE roadmap (MVP and
   post-MVP) of issues/bugs versus enhancements? For example AV1
   or uses 360 or immersive or live is an enhancement.

   Matt: would like to understand the scenario

   Mark: any other questions?

   John: is there an issue tracking for content validation?

   Matt: not a MSE issue
   ... but if you go back to the previous session
   ... there was some discussion
   ... someone interested in byte stream handling
   ... dash, cmaf validations

   Will: if there is similar code base, we might want to look into

   John: we intend to create test content
   ... many contents we've already implemented

   Matt: there are several issues we have not resolved

   John: bridging those two things interesting

   Barbara: good time to ask a question?
   ... hearing a couple of things connected to roadmap
   ... also hearing usage
   ... pipeline for 360
   ... what we trying to fix
   ... streaming and alive richer enhancement

   Matt: much of work
   ... fixing up some of the issues
   ... buffered media
   ... what to do the gap
   ... clearer definition to understand what's happening
   ... please file an issue
   ... are you seeing a gap?

   Barbara: more interested in higher roadmap for standardization
   ... what is the minimum product

   Matt: tx for your feedback

   Will: change type specifically?
   ... what are the other browser doing?
   ... other than chrome
   ... mozilla, ms, chromium, safari

   Matt: not sure about the other implementations, but...

   John: MS is moving to chromium-based

   Mark: any other questions?

   Matt: would like to mention wpt work

   [14]wpt - mediasource

     [14] https://wpt.fyi/results/media-source?label=master&product=chrome[experimental]&product=edge&product=firefox[experimental]&product=safari[experimental]&aligned

   Mark: would like to thank Matt for giving talk
   ... also thank all for participation


Summary of Action Items

Summary of Resolutions

   [End of minutes]

    Minutes manually created (not a transcript), formatted by
    David Booth's [15]scribe.perl version 1.154 ([16]CVS log)
    $Date: 2019/04/07 15:28:11 $

     [15] http://dev.w3.org/cvsweb/~checkout~/2002/scribe/scribedoc.htm
     [16] http://dev.w3.org/cvsweb/2002/scribe/
Received on Sunday, 7 April 2019 15:33:43 UTC

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