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<title>Media Fragments Working Group Teleconference -- 02 Sep
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<h1>Media Fragments Working Group Teleconference</h1>
<h2>02 Sep 2009</h2>
<p><a href=
'http://lists.w3.org/Archives/Public/public-media-fragment/2009Sep/0000.html'>
Agenda</a></p>
<p>See also: <a href=
"http://www.w3.org/2009/09/02-mediafrag-irc">IRC log</a></p>
<h2><a name="attendees" id="attendees">Attendees</a></h2>
<div class="intro">
<dl>
<dt>Present</dt>
<dd>Raphael, Davy, Silvia, Yves, thierry, Conrad</dd>
<dt>Regrets</dt>
<dd>Erik, Michael</dd>
<dt>Chair</dt>
<dd>Raphael</dd>
<dt>Scribe</dt>
<dd>raphael</dd>
</dl>
</div>
<h2>Contents</h2>
<ul>
<li>
<a href="#agenda">Topics</a>
<ol>
<li><a href="#item01">1. ADMIN</a></li>
<li><a href="#item02">2. UC and Requirements</a></li>
<li><a href="#item03">3. Specification</a></li>
<li><a href="#item04">4. Test Cases</a></li>
<li><a href="#item05">5. Implementation</a></li>
<li><a href="#item06">6. AOB</a></li>
</ol>
</li>
<li><a href="#ActionSummary">Summary of Action Items</a></li>
</ul>
<hr />
<div class="meeting">
<p class='phone'>&nbsp;</p>
<p class='phone'>&nbsp;</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; Date: 02 September
2009</p>
<p class='phone'><a href=
"http://www.w3.org/2008/WebVideo/Fragments/">http://www.w3.org/2008/WebVideo/Fragments/</a></p>
<h3 id="item01">1. ADMIN</h3>
<p class='phone'>PROPOSED to accept the minutes of the 26
August 2009 telecon</p>
<p class='phone'><a href=
"http://www.w3.org/2009/08/26-mediafrag-minutes.html">http://www.w3.org/2009/08/26-mediafrag-minutes.html</a></p>
<p class='irc'>&lt;<cite>silvia</cite>&gt; +1</p>
<p class='irc'>&lt;<cite>davy</cite>&gt; +1</p>
<p class='phone'>+1</p>
<p class='phone'>Minutes accepted</p>
<p class='irc'>&lt;<cite>Yves</cite>&gt; +1</p>
<p class='phone'>Quick poll: <a href=
"http://www.doodle.com/xbw9stfdmz3pr4nw">http://www.doodle.com/xbw9stfdmz3pr4nw</a></p>
<p class='phone'>We are still missing answers from Jack and
Conrad</p>
<p class='phone'><cite>scribe:</cite> we are likely to meet
during these 2 time slots on Thu 17 and Fri 18/09</p>
<p class='phone'>[silence]</p>
<p class='phone'>Anyone has a proposal for a virtual blackboard
tool we could use ?</p>
<p class='irc'>&lt;<cite>tmichel</cite>&gt; I can book
Zakim</p><a name="action01" id="action01"></a>
<p class='irc'>&lt;<cite>scribe</cite>&gt;
<strong>ACTION:</strong> Thierry to book Zakim on Th 17 and Fri
18/09, from 10:00 till 12:00 CET [recorded in <a href=
"http://www.w3.org/2009/09/02-mediafrag-minutes.html#action01">http://www.w3.org/2009/09/02-mediafrag-minutes.html#action01</a>]</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; Created ACTION-102
- Book Zakim on Th 17 and Fri 18/09, from 10:00 till 12:00 CET
[on Thierry Michel - due 2009-09-09].</p>
<p class='irc'>&lt;<cite>tmichel</cite>&gt; Ok will convert To
prper Time</p>
<p class='phone'>thanks</p>
<p class='phone'>Yves and I will most likely share an office
during the call</p>
<h3 id="item02">2. UC and Requirements</h3>
<p class='phone'>ACTION-101?</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; ACTION-101 -- Yves
Lafon to write a UC describing the use of aspect ratio feature
and thus motivating its usage -- due 2009-09-02 -- OPEN</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; <a href=
"http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/101">
http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/101</a></p>
<p class='irc'>&lt;<cite>scribe</cite>&gt; ... pending</p>
<p class='phone'><cite>Raphael:</cite> reviews of our documents
will come from the Media Annotations WG (Felix), and TimedText
(Philippe)<br />
... Chris from SVG said that they were interested to review it,
but I don't know whether they have done something</p>
<p class='phone'><cite>Yves:</cite> I will relaunch TAG early
next week</p>
<h3 id="item03">3. Specification</h3>
<p class='phone'>3.1: Terminology</p>
<p class='phone'><cite>Silvia:</cite> proposal to replace all
occurence of URI by URI Ref, see <a href=
"http://lists.w3.org/Archives/Public/public-media-fragment/2009Aug/0066.html">
http://lists.w3.org/Archives/Public/public-media-fragment/2009Aug/0066.html</a></p>
<p class='phone'>Michael gave a +1 on the mailing list to this
proposal</p>
<p class='irc'>&lt;<cite>davy</cite>&gt; +1</p>
<p class='irc'>&lt;<cite>tmichel</cite>&gt; +1</p>
<p class='phone'><cite>Silvia:</cite> Yves, what is your take
on that?</p>
<p class='irc'>&lt;<cite>silvia</cite>&gt; <a href=
"http://labs.apache.org/webarch/uri/rfc/rfc3986.html#uri-reference">
http://labs.apache.org/webarch/uri/rfc/rfc3986.html#uri-reference</a></p>
<p class='irc'>&lt;<cite>tmichel</cite>&gt; we could also say
that when we say URI we mean URI reference</p>
<p class='irc'>&lt;<cite>silvia</cite>&gt; <a href=
"http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spec/">
http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spec/</a>
&lt;- title</p>
<p class='phone'><cite>Yves:</cite> if we use the term URI ref,
will the people understand what we mean?</p>
<p class='phone'><cite>Silvia:</cite> alternative (also
suggested by Thierry) to add a paragraph clarifying our
statement</p>
<p class='irc'>&lt;<cite>tmichel</cite>&gt; +1 for a
preliminary paragraph</p>
<p class='phone'><cite>Silvia:</cite> I'm ok with that, just
wanted to point out the issue</p><a name="action02" id=
"action02"></a>
<p class='irc'>&lt;<cite>scribe</cite>&gt;
<strong>ACTION:</strong> silvia to write such a paragraph in
our 2 documents, most likely within the Terminology sections
[recorded in <a href=
"http://www.w3.org/2009/09/02-mediafrag-minutes.html#action02">http://www.w3.org/2009/09/02-mediafrag-minutes.html#action02</a>]</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; Created ACTION-103
- Write such a paragraph in our 2 documents, most likely within
the Terminology sections [on Silvia Pfeiffer - due
2009-09-09].</p>
<p class='phone'>3.2 Syntax</p>
<p class='phone'>Proposal for RESOLUTION: we will *NOT* allow
editUnits</p>
<p class='phone'>for specifying the temporal dimension</p>
<p class='irc'>&lt;<cite>silvia</cite>&gt; +1</p>
<p class='phone'>+1</p>
<p class='irc'>&lt;<cite>davy</cite>&gt; +1</p>
<p class='irc'>&lt;<cite>Yves</cite>&gt; +1</p>
<p class='phone'><cite>Yves:</cite> also to not fall in the
trap of the MPEG-21 complexity</p>
<p class='phone'><strong class='resolution'>RESOLUTION: we will
*NOT* allow editUnits for specifying the temporal
dimension</strong></p>
<p class='phone'>Discussion 2: have absolute time specification
that contains day and year</p>
<p class='phone'><cite>Silvia:</cite> all done, using the clock
scheme, added in the document and wiki</p>
<p class='irc'>&lt;<cite>silvia</cite>&gt; <a href=
"http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spec/#naming-syntax">
http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spec/#naming-syntax</a></p>
<p class='phone'><cite>Silvia:</cite> based on the HTML5/SMIL
EBNF syntax</p>
<p class='phone'>ACTION-49?</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; ACTION-49 -- Yves
Lafon to draft the HTTP-Range syntax for different units
(completing all the syntax for the two way handshake) -- due
2009-09-02 -- OPEN</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; <a href=
"http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/49">http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/49</a></p>
<p class='irc'>&lt;<cite>silvia</cite>&gt; am hoping we can get
a reference implementation using flumotion for the clock time
spec</p>
<p class='phone'><cite>Yves:</cite> ongoing, but will have
things done at the end of this week ... At least for seconds,
so people can implement</p>
<p class='phone'>3.3 UA Server HTTP Communication</p>
<p class='phone'>The respective role of ? and #: see Silvia's
blog post at <a href=
"http://blog.gingertech.net/2009/08/19/jumping-to-time-offsets-in-videos/">
http://blog.gingertech.net/2009/08/19/jumping-to-time-offsets-in-videos/</a></p>
<p class='phone'><cite>Yves:</cite> what are the issues ?<br />
... we could mandate the use of ? when there is transcoding
happening<br />
... since a new resource is created<br />
... while # will be used in other cases</p>
<p class='irc'>&lt;<cite>Yves</cite>&gt; <a href=
"http://tools.ietf.org/html/draft-gregorio-uritemplate-03">http://tools.ietf.org/html/draft-gregorio-uritemplate-03</a></p>
<p class='phone'><cite>Yves:</cite> the URI template might be
usable now</p>
<p class='phone'><cite>Silvia:</cite> what the URI template
will be used for?</p>
<p class='phone'><cite>Yves:</cite> it will be useful in the
case of ? ... to say that the server is aware of how to process
media sub-resources</p>
<p class='phone'><cite>Silvia:</cite> I wouldn't prescribe
that<br />
... I would rather say that URI template is useful in the case
of ? but not make it dependent</p>
<p class='phone'><cite>Yves:</cite> it is mostly used in
definition, no need for implementation<br />
... I'm not sure this is the right solution, but worth to
investigate</p>
<p class='phone'><cite>Silvia:</cite> yes, we might do a URI
template for the ?<br />
... actually, I would look into it</p><a name="action03" id=
"action03"></a>
<p class='irc'>&lt;<cite>scribe</cite>&gt;
<strong>ACTION:</strong> Yves to start a thread on the mailing
list to summarize the state of the discussion regarding ? and #
(? when transcoding happening, #for other cases) + use of URI
template for ? [recorded in <a href=
"http://www.w3.org/2009/09/02-mediafrag-minutes.html#action03">http://www.w3.org/2009/09/02-mediafrag-minutes.html#action03</a>]</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; Created ACTION-104
- Start a thread on the mailing list to summarize the state of
the discussion regarding ? and # (? when transcoding happening,
#for other cases) + use of URI template for ? [on Yves Lafon -
due 2009-09-09].</p>
<p class='phone'>ACTION-69?</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; ACTION-69 --
Conrad Parker to draw a representation of the general structure
of a media resource, for streamable formats (H/H' + K + D1 + D2
+ D3) -- due 2009-04-24 -- OPEN</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; <a href=
"http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/69">http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/69</a></p>
<p class='phone'>I will ping Conrad what's the status</p>
<h3 id="item04">4. Test Cases</h3>
<p class='phone'>ACTON-93?</p>
<p class='phone'>ACTION-93?</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; ACTION-93 --
Michael Hausenblas to revisit the TC and see which are effected
by the temporal-optional-comma-decision -- due 2009-07-29 --
OPEN</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; <a href=
"http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/93">http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/93</a></p>
<p class='phone'>still pending while I have closed
ACTION-99</p>
<p class='phone'>Michael tool: <a href=
"http://ld2sd.deri.org/corrib/">http://ld2sd.deri.org/corrib/</a></p>
<p class='phone'>Should we use this tool that Michael hacks
?</p>
<p class='phone'><cite>Yves:</cite> I'm happy if Michael wants
to further develop it</p>
<p class='phone'><cite>Raphael:</cite> do we have already
feedback to provide to Michael ?</p>
<p class='phone'>[silence]</p>
<p class='phone'><cite>Raphael:</cite> I'm happy with the
tool</p>
<p class='irc'>&lt;<cite>silvia</cite>&gt; I think this table
needs row numbers</p>
<p class='phone'><cite>Raphael:</cite> I interpret your silence
as you would not mind to add new TC and interact with them</p>
<p class='phone'>Feature proposal: add row numbers in the
table</p>
<p class='phone'>thanks Silvia</p>
<p class='irc'>&lt;<cite>silvia</cite>&gt; also, somebody needs
to add the other discussed test cases :)</p>
<p class='phone'><cite>Raphael:</cite> yes, we will ask Michael
:-)</p>
<h3 id="item05">5. Implementation</h3>
<p class='phone'><cite>Silvia:</cite> nice demo, play it at
<a href=
"http://new.annodex.net/~silvia/itext/mediafrag.html">http://new.annodex.net/~silvia/itext/mediafrag.html</a></p>
<p class='irc'>&lt;<cite>silvia</cite>&gt; <a href=
"http://blog.gingertech.net/2009/09/02/demo-of-deep-hyperlinking-into-html5-video/">
http://blog.gingertech.net/2009/09/02/demo-of-deep-hyperlinking-into-html5-video/</a></p>
<p class='phone'>Blog post: <a href=
"http://blog.gingertech.net/2009/09/02/demo-of-deep-hyperlinking-into-html5-video/">
http://blog.gingertech.net/2009/09/02/demo-of-deep-hyperlinking-into-html5-video/</a></p>
<p class='phone'><cite>Silvia:</cite> what I have done is to
showcase for the HTML5 WG what the media frag spec could
do<br />
... I don't cover all the spec, temporal dimension only and
simple way of specifying time<br />
... no error handling<br />
... basic goal is to replicate YouTube functionalities ... but
cooler ;-)<br />
... everything implemented in Javascript<br />
... it will become much more complicated if we implement all
the schemes we foresee in the spec<br />
... but the proof of concept is more important at this
point</p>
<p class='phone'><cite>Raphael:</cite> would you mind to cc the
Media Fragments WG if you advertise this demo to the WHAT/HTML5
mailing lists ?</p>
<p class='phone'><cite>Silvia:</cite> no problem</p>
<p class='phone'><cite>Raphael:</cite> perhaps warn the
audience that this does not cover the protocol part of the
spec, how the bits will be send between the server and the
UA<br />
... but on client side, it shows nicely what the media
fragments URI spec will enable</p>
<p class='phone'><cite>Silvia:</cite> I have to use a hack for
caching / optimizing the media duration and not perform look up
all the time<br />
... Mozilla guys are happy to make this feature standard
anyway<br />
... this is particular to the ogg format<br />
... can I get approval from the group for advertizing this work
to WHAT?</p>
<p class='phone'><cite>Raphael:</cite> absolutely !</p>
<p class='irc'>&lt;<cite>davy</cite>&gt; +1</p>
<p class='irc'>&lt;<cite>conrad</cite>&gt; +1</p>
<p class='phone'>Conrad, you're not on the phone, I need to
chase you for some actions ... pending and overdue</p>
<p class='phone'>is there any strong constraint with this hour
for you?</p>
<p class='phone'>ACTION-90?</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; ACTION-90 -- Davy
Van Deursen to provide a pointer to Yves to a lib he can use to
slice media files -- due 2009-10-14 -- OPEN</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; <a href=
"http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/90">http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/90</a></p>
<p class='phone'><cite>Davy:</cite> still pending, it is more
complicated than what I thought ...<br />
... there is service, but these are not libraries we can
interface</p>
<p class='irc'>&lt;<cite>conrad</cite>&gt; raphael, sorry, no
strong constraint, i was delayed coming home from work</p>
<p class='phone'><cite>Davy:</cite> we will use our platform,
but we need to provide the interface<br />
... for Yves's hacking<br />
... I will write more information on the wiki page when this is
done<br />
... should be done by 17/09/2009</p>
<p class='phone'>Wiki page: <a href=
"http://www.w3.org/2008/WebVideo/Fragments/wiki/ImplementationExperiment">
http://www.w3.org/2008/WebVideo/Fragments/wiki/ImplementationExperiment</a></p>
<p class='irc'>&lt;<cite>silvia</cite>&gt; ok</p>
<p class='phone'>Silvia, could you add your demo on this
page?</p>
<h3 id="item06">6. AOB</h3>
<p class='phone'>Is there any other business you would like to
discuss?</p>
<p class='phone'>Conrad, could you please fill <a href=
"http://www.doodle.com/xbw9stfdmz3pr4nw">http://www.doodle.com/xbw9stfdmz3pr4nw</a>
asap ?</p>
<p class='phone'><cite>Raphael:</cite> we should think about
the structure for the virtual meeting</p>
<p class='irc'>&lt;<cite>Yves</cite>&gt; yep</p>
<p class='phone'><cite>Discussion:</cite> ? vs # /
implementations / protocol stuff / test cases</p>
<p class='phone'><cite>Conrad:</cite> we need the status of
your actions<br />
... and we need to have a telecon on the protocol
comparison</p>
<p class='phone'>when can we have that?</p>
<p class='irc'>&lt;<cite>silvia</cite>&gt; how is Action-69? Is
it too hard to draw? would it be better to describe?</p>
<p class='irc'>&lt;<cite>conrad</cite>&gt; action 69 is not yet
done</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; Sorry, couldn't
find user - 69</p>
<p class='irc'>&lt;<cite>conrad</cite>&gt; i have some diagrams
close to that ;-)</p>
<p class='phone'>ACTION-69?</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; ACTION-69 --
Conrad Parker to draw a representation of the general structure
of a media resource, for streamable formats (H/H' + K + D1 + D2
+ D3) -- due 2009-04-24 -- OPEN</p>
<p class='irc'>&lt;<cite>trackbot</cite>&gt; <a href=
"http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/69">http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/69</a></p>
<p class='phone'><cite>Conrad:</cite> I have already diagrams
close to that</p>
<p class='phone'><cite>Poll:</cite> <a href=
"http://www.doodle.com/xbw9stfdmz3pr4nw">http://www.doodle.com/xbw9stfdmz3pr4nw</a></p>
<p class='phone'>it would be great if you could make one of the
two time slots</p>
<p class='phone'>[adjourned]</p>
</div>
<h2><a name="ActionSummary" id="ActionSummary">Summary of Action
Items</a></h2><!-- Action Items -->
<strong>[NEW]</strong> <strong>ACTION:</strong> silvia to write
such a paragraph in our 2 documents, most likely within the
Terminology sections [recorded in <a href=
"http://www.w3.org/2009/09/02-mediafrag-minutes.html#action02">http://www.w3.org/2009/09/02-mediafrag-minutes.html#action02</a>]<br />
<strong>[NEW]</strong> <strong>ACTION:</strong> Thierry to book
Zakim on Th 17 and Fri 18/09, from 10:00 till 12:00 CET [recorded
in <a href=
"http://www.w3.org/2009/09/02-mediafrag-minutes.html#action01">http://www.w3.org/2009/09/02-mediafrag-minutes.html#action01</a>]<br />
<strong>[NEW]</strong> <strong>ACTION:</strong> Yves to start a
thread on the mailing list to summarize the state of the
discussion regarding ? and # (? when transcoding happening, #for
other cases) + use of URI template for ? [recorded in <a href=
"http://www.w3.org/2009/09/02-mediafrag-minutes.html#action03">http://www.w3.org/2009/09/02-mediafrag-minutes.html#action03</a>]<br />
&nbsp;<br />
[End of minutes]<br />
<hr />
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Minutes formatted by David Booth's <a href=
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$Date: 2009/09/02 13:13:24 $
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