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326 lines
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326 lines
11 KiB
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<meta name="generator" content=
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<title>Media Fragments Working Group Teleconference -- 20 Oct
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2010</title>
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<p><a href="http://www.w3.org/"><img src=
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<h1>Media Fragments Working Group Teleconference</h1>
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<h2>20 Oct 2010</h2>
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<p><a href=
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'http://lists.w3.org/Archives/Public/public-media-fragment/2010Oct/0013.html'>
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Agenda</a></p>
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<p>See also: <a href=
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"http://www.w3.org/2010/10/20-mediafrag-irc">IRC log</a></p>
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<h2><a name="attendees" id="attendees">Attendees</a></h2>
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<div class="intro">
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<dl>
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<dt>Present</dt>
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<dd>Philip, raphael, davy, jack_(irc), silvia, Yves</dd>
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<dt>Regrets</dt>
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<dd>Erik, Jack</dd>
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<dt>Chair</dt>
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<dd>Raphael</dd>
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<dt>Scribe</dt>
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<dd>raphael</dd>
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</dl>
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</div>
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<h2>Contents</h2>
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<ul>
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<li>
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<a href="#agenda">Topics</a>
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<ol>
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<li><a href="#item01">1. Admin</a></li>
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<li><a href="#item02">2. MEDIA FRAGMENT EXTENSION</a></li>
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<li><a href="#item03">3. Implementation experiment</a></li>
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<li><a href="#item04">4. AOB</a></li>
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</ol>
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</li>
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<li><a href="#ActionSummary">Summary of Action Items</a></li>
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</ul>
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<hr />
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<div class="meeting">
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<p class='phone'></p>
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<p class='phone'></p>
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<p class='irc'><<cite>trackbot</cite>> Date: 20 October
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2010</p>
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<p class='irc'><<cite>scribe</cite>> Scribe: raphael</p>
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<p class='irc'><<cite>scribe</cite>> Scribenick:
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raphael</p>
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<h3 id="item01">1. Admin</h3>
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<p class='phone'>PROPOSED to accept the minutes of the 06
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October 2010 telecon</p>
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<p class='phone'><a href=
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"http://www.w3.org/2010/10/06-mediafrag-minutes.html">http://www.w3.org/2010/10/06-mediafrag-minutes.html</a></p>
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<p class='irc'><<cite>foolip</cite>> +1</p>
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<p class='irc'><<cite>davy</cite>> +1</p>
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<p class='phone'>minutes are accepted</p>
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<p class='phone'>ACTION-185?</p>
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<p class='irc'><<cite>trackbot</cite>> ACTION-185 -- Yves
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Lafon to book zakim for the 2 days meeting of the group on Mon
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1st and Tue 2nd Nov -- due 2010-09-29 -- OPEN</p>
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<p class='irc'><<cite>trackbot</cite>> <a href=
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"http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/185">
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http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/185</a></p>
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<p class='irc'><<cite>foolip</cite>> November 1 and 2,
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any time between 0800 and 1800 in UTC+2</p>
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<p class='phone'><cite>Raphael:</cite> for Silvia and Philip,
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could you write down time slot where we can phone you</p>
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<p class='irc'><<cite>silvia</cite>> Monday is better for
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me than Tuesday - it's both in the afternoon/evening for me, I
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think</p>
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<p class='irc'><<cite>foolip</cite>> in other words, any
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time is fine, since I'm in the same timezone as TPAC</p>
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<p class='irc'><<cite>silvia</cite>> if you start early,
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I can join in the mornings</p>
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<h3 id="item02">2. MEDIA FRAGMENT EXTENSION</h3>
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<p class='phone'>ACTION-189?</p>
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<p class='irc'><<cite>trackbot</cite>> ACTION-189 --
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Raphaël Troncy to put the top-level production rules back into
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the document (in section 4.3.5 or 4.1) -- due 2010-10-06 --
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OPEN</p>
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<p class='irc'><<cite>trackbot</cite>> <a href=
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"http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/189">
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http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/189</a></p>
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<p class='irc'><<cite>silvia</cite>> ok</p>
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<p class='irc'><<cite>foolip</cite>> can't say anything
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until I see the actual suggestion for the spec</p>
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<p class='phone'><cite>Raphael:</cite> I will implement the
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ACTION-189 in the spec and ask all the group if we can close
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this issue</p>
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<h3 id="item03">3. Implementation experiment</h3>
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<p class='phone'><cite>Raphael:</cite> problem with pixels, are
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we talking about physical pixels or css pixels?</p>
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<p class='phone'><cite>Silvia:</cite> pixels in video are
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always a problem</p>
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<p class='phone'><cite>Raphael:</cite> I'm looking for a
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reference that we could use so that any developers understand
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what we are talking about</p>
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<p class='phone'><cite>Philip:</cite> this definition is
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provided by HTML5 and not CSS</p>
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<p class='irc'><<cite>foolip</cite>> <a href=
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"http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#concept-video-intrinsic-width">
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http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#concept-video-intrinsic-width</a></p>
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<p class='irc'><<cite>foolip</cite>> <a href=
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"http://dev.w3.org/html5/spec/video.html#concept-video-intrinsic-width">
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http://dev.w3.org/html5/spec/video.html#concept-video-intrinsic-width</a></p><a name="action01"
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id="action01"></a>
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<p class='irc'><<cite>scribe</cite>>
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<strong>ACTION:</strong> troncy to update our spec to talk
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about video intrinsic width [recorded in <a href=
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"http://www.w3.org/2010/10/20-mediafrag-minutes.html#action01">http://www.w3.org/2010/10/20-mediafrag-minutes.html#action01</a>]</p>
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<p class='irc'><<cite>trackbot</cite>> Created ACTION-190
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- Update our spec to talk about video intrinsic width [on
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Raphaël Troncy - due 2010-10-27].</p>
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<p class='irc'><<cite>foolip</cite>> well, there's an
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issue we discussed at FOMS</p>
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<p class='phone'><cite>Davy:</cite> this issue is solved</p>
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<p class='irc'><<cite>foolip</cite>> ah :)</p>
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<p class='phone'><cite>Davy:</cite> there is indeed too many
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byte ranges to send to the UA</p>
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<p class='irc'><<cite>foolip</cite>> do you always
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redirect, or just when number of ranges > n ?</p>
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<p class='phone'><cite>Davy:</cite> therefore, we send a
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redirect pointing to a media fragment with the ?</p>
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<p class='irc'><<cite>foolip</cite>> always seems simpler
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:)</p>
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<p class='phone'><cite>Davy:</cite> currently, always
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redirect</p>
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<p class='phone'><cite>Raphael:</cite> the UA issues a new
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request with the query parameter</p>
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<p class='phone'><cite>Davy:</cite> yes, and we had a Link
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header pointing to the master resource</p>
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<p class='phone'><cite>Philip:</cite> we could implement that
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but I really wonder if it is useful<br />
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... we will always need a specialized server<br />
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... so the query parameter migt be enough</p>
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<p class='phone'><cite>Davy:</cite> there are other scenarios
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where the # is useful<br />
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... we should have both<br />
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... even if in the retrieval scenario, the # will always be
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converted into the ?</p>
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<p class='phone'><cite>Philip:</cite> what should we do with
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the name dimension</p>
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<p class='phone'><cite>Davy:</cite> in MP4, refer to the cue
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points; in Matroska, refer to the chapters names</p>
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<p class='phone'><cite>Philip:</cite> OK, yes the chapters are
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part of WebM</p>
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<p class='irc'><<cite>silvia</cite>> and Ogg can have
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chapters through a srt chapter track in Ogg Kate</p>
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<p class='phone'><cite>Raphael:</cite> ok, so it seems
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important that we cover the name dimension even if it is
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limited to chapter names!<br />
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... last issue from Philip, make the hour optional in
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specifying the time dimension<br />
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... currently, we need one or two digits<br />
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... but most clips have duration less than 1 hour<br />
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... but the grammar will be more complicated<br />
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... because we could then have just one digit for the
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minutes</p>
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<p class='phone'><cite>Philip:</cite> in WebSRT, the hours are
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optional</p>
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<p class='phone'><cite>Raphael:</cite> I suggest we discuss
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this at the F2F</p>
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<p class='irc'><<cite>silvia</cite>> I would support that
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if you can find a grammar to describe it correctly - it's also
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more complicated to implement then, btw</p>
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<p class='phone'>Look at the demos at <a href=
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"http://www.w3.org/2008/WebVideo/Fragments/code/plugin/demos/">http://www.w3.org/2008/WebVideo/Fragments/code/plugin/demos/</a></p>
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<p class='phone'><cite>Davy:</cite> yes, Ninsuna understands
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range request with SMPTE time codes<br />
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... and answers with smpte time codes<br />
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... though I need to check</p>
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<p class='phone'>Yes Silvia, that's also our conclusion, re the
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grammar</p>
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<p class='phone'><cite>scribe:</cite> the questio is who is
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willing to work out this more complex grammar? I suggest to
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hack this during the f2f but if you want to work on it before,
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please feel free</p>
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<p class='irc'><<cite>silvia</cite>> do it with Yves - he
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is good at that stuff :)</p>
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<h3 id="item04">4. AOB</h3>
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<p class='phone'>no other topic to discuss</p>
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<p class='phone'>meeting adjourned</p>
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<p class='irc'><<cite>foolip</cite>> ok, about the syntax
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then</p>
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<p class='irc'><<cite>foolip</cite>> it's be simplest to
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just say that all components are 1 or 2 digits</p>
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<p class='irc'><<cite>foolip</cite>> ugly, but simpler,
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and simple is good :)</p>
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<p class='phone'>:-)</p>
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<p class='irc'><<cite>foolip</cite>> but let's discuss
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that further later</p>
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<p class='phone'>we will see what the grammar should loook
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like, indeed, Yves might be able to sort that out elegantly</p>
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</div>
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<h2><a name="ActionSummary" id="ActionSummary">Summary of Action
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Items</a></h2><!-- Action Items -->
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<strong>[NEW]</strong> <strong>ACTION:</strong> troncy to update
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our spec to talk about video intrinsic width [recorded in
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<a href="http://www.w3.org/2010/10/20-mediafrag-minutes.html#action01">
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http://www.w3.org/2010/10/20-mediafrag-minutes.html#action01</a>]<br />
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<br />
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[End of minutes]<br />
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<hr />
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<address>
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Minutes formatted by David Booth's <a href=
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"http://dev.w3.org/cvsweb/~checkout~/2002/scribe/scribedoc.htm">
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scribe.perl</a> version 1.135 (<a href=
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"http://dev.w3.org/cvsweb/2002/scribe/">CVS log</a>)<br />
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$Date: 2010/10/20 09:48:54 $
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</address>
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