- From: Raphaël Troncy <Raphael.Troncy@cwi.nl>
- Date: Wed, 02 Sep 2009 16:25:14 +0200
- To: Media Fragment <public-media-fragment@w3.org>
All,
The minutes are available for review at
http://www.w3.org/2009/09/02-mediafrag-minutes.html (and in text format
below).
Cheers.
Erik & Raphaël
-----------
[1]W3C
[1] http://www.w3.org/
Media Fragments Working Group Teleconference
02 Sep 2009
[2]Agenda
[2]
http://lists.w3.org/Archives/Public/public-media-fragment/2009Sep/0000.html
See also: [3]IRC log
[3] http://www.w3.org/2009/09/02-mediafrag-irc
Attendees
Present
Raphael, Davy, Silvia, Yves, thierry, Conrad
Regrets
Erik, Michael
Chair
Raphael
Scribe
raphael
Contents
* [4]Topics
1. [5]1. ADMIN
2. [6]2. UC and Requirements
3. [7]3. Specification
4. [8]4. Test Cases
5. [9]5. Implementation
6. [10]6. AOB
* [11]Summary of Action Items
_________________________________________________________
<trackbot> Date: 02 September 2009
[12]http://www.w3.org/2008/WebVideo/Fragments/
[12] http://www.w3.org/2008/WebVideo/Fragments/
1. ADMIN
PROPOSED to accept the minutes of the 26 August 2009 telecon
[13]http://www.w3.org/2009/08/26-mediafrag-minutes.html
[13] http://www.w3.org/2009/08/26-mediafrag-minutes.html
<silvia> +1
<davy> +1
+1
Minutes accepted
<Yves> +1
Quick poll: [14]http://www.doodle.com/xbw9stfdmz3pr4nw
[14] http://www.doodle.com/xbw9stfdmz3pr4nw
We are still missing answers from Jack and Conrad
scribe: we are likely to meet during these 2 time slots on Thu 17
and Fri 18/09
[silence]
Anyone has a proposal for a virtual blackboard tool we could use ?
<tmichel> I can book Zakim
<scribe> ACTION: Thierry to book Zakim on Th 17 and Fri 18/09, from
10:00 till 12:00 CET [recorded in
[15]http://www.w3.org/2009/09/02-mediafrag-minutes.html#action01]
<trackbot> 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].
<tmichel> Ok will convert To prper Time
thanks
Yves and I will most likely share an office during the call
2. UC and Requirements
ACTION-101?
<trackbot> 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
<trackbot>
[16]http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/101
[16] http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/101
<scribe> ... pending
Raphael: reviews of our documents will come from the Media
Annotations WG (Felix), and TimedText (Philippe)
... Chris from SVG said that they were interested to review it, but
I don't know whether they have done something
Yves: I will relaunch TAG early next week
3. Specification
3.1: Terminology
Silvia: proposal to replace all occurence of URI by URI Ref, see
[17]http://lists.w3.org/Archives/Public/public-media-fragment/2009Au
g/0066.html
[17]
http://lists.w3.org/Archives/Public/public-media-fragment/2009Aug/0066.html
Michael gave a +1 on the mailing list to this proposal
<davy> +1
<tmichel> +1
Silvia: Yves, what is your take on that?
<silvia>
[18]http://labs.apache.org/webarch/uri/rfc/rfc3986.html#uri-referenc
e
[18] http://labs.apache.org/webarch/uri/rfc/rfc3986.html#uri-reference
<tmichel> we could also say that when we say URI we mean URI
reference
<silvia>
[19]http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spe
c/ <- title
[19]
http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spec/
Yves: if we use the term URI ref, will the people understand what we
mean?
Silvia: alternative (also suggested by Thierry) to add a paragraph
clarifying our statement
<tmichel> +1 for a preliminary paragraph
Silvia: I'm ok with that, just wanted to point out the issue
<scribe> ACTION: silvia to write such a paragraph in our 2
documents, most likely within the Terminology sections [recorded in
[20]http://www.w3.org/2009/09/02-mediafrag-minutes.html#action02]
<trackbot> Created ACTION-103 - Write such a paragraph in our 2
documents, most likely within the Terminology sections [on Silvia
Pfeiffer - due 2009-09-09].
3.2 Syntax
Proposal for RESOLUTION: we will *NOT* allow editUnits
for specifying the temporal dimension
<silvia> +1
+1
<davy> +1
<Yves> +1
Yves: also to not fall in the trap of the MPEG-21 complexity
RESOLUTION: we will *NOT* allow editUnits for specifying the
temporal dimension
Discussion 2: have absolute time specification that contains day and
year
Silvia: all done, using the clock scheme, added in the document and
wiki
<silvia>
[21]http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spe
c/#naming-syntax
[21]
http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spec/#naming-syntax
Silvia: based on the HTML5/SMIL EBNF syntax
ACTION-49?
<trackbot> 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
<trackbot>
[22]http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/49
[22] http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/49
<silvia> am hoping we can get a reference implementation using
flumotion for the clock time spec
Yves: ongoing, but will have things done at the end of this week ...
At least for seconds, so people can implement
3.3 UA Server HTTP Communication
The respective role of ? and #: see Silvia's blog post at
[23]http://blog.gingertech.net/2009/08/19/jumping-to-time-offsets-in
-videos/
[23]
http://blog.gingertech.net/2009/08/19/jumping-to-time-offsets-in-videos/
Yves: what are the issues ?
... we could mandate the use of ? when there is transcoding
happening
... since a new resource is created
... while # will be used in other cases
<Yves> [24]http://tools.ietf.org/html/draft-gregorio-uritemplate-03
[24] http://tools.ietf.org/html/draft-gregorio-uritemplate-03
Yves: the URI template might be usable now
Silvia: what the URI template will be used for?
Yves: it will be useful in the case of ? ... to say that the server
is aware of how to process media sub-resources
Silvia: I wouldn't prescribe that
... I would rather say that URI template is useful in the case of ?
but not make it dependent
Yves: it is mostly used in definition, no need for implementation
... I'm not sure this is the right solution, but worth to
investigate
Silvia: yes, we might do a URI template for the ?
... actually, I would look into it
<scribe> ACTION: 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
[25]http://www.w3.org/2009/09/02-mediafrag-minutes.html#action03]
<trackbot> 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].
ACTION-69?
<trackbot> 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
<trackbot>
[26]http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/69
[26] http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/69
I will ping Conrad what's the status
4. Test Cases
ACTON-93?
ACTION-93?
<trackbot> ACTION-93 -- Michael Hausenblas to revisit the TC and see
which are effected by the temporal-optional-comma-decision -- due
2009-07-29 -- OPEN
<trackbot>
[27]http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/93
[27] http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/93
still pending while I have closed ACTION-99
Michael tool: [28]http://ld2sd.deri.org/corrib/
[28] http://ld2sd.deri.org/corrib/
Should we use this tool that Michael hacks ?
Yves: I'm happy if Michael wants to further develop it
Raphael: do we have already feedback to provide to Michael ?
[silence]
Raphael: I'm happy with the tool
<silvia> I think this table needs row numbers
Raphael: I interpret your silence as you would not mind to add new
TC and interact with them
Feature proposal: add row numbers in the table
thanks Silvia
<silvia> also, somebody needs to add the other discussed test cases
:)
Raphael: yes, we will ask Michael :-)
5. Implementation
Silvia: nice demo, play it at
[29]http://new.annodex.net/~silvia/itext/mediafrag.html
[29] http://new.annodex.net/~silvia/itext/mediafrag.html
<silvia>
[30]http://blog.gingertech.net/2009/09/02/demo-of-deep-hyperlinking-
into-html5-video/
[30]
http://blog.gingertech.net/2009/09/02/demo-of-deep-hyperlinking-into-html5-video/
Blog post:
[31]http://blog.gingertech.net/2009/09/02/demo-of-deep-hyperlinking-
into-html5-video/
[31]
http://blog.gingertech.net/2009/09/02/demo-of-deep-hyperlinking-into-html5-video/
Silvia: what I have done is to showcase for the HTML5 WG what the
media frag spec could do
... I don't cover all the spec, temporal dimension only and simple
way of specifying time
... no error handling
... basic goal is to replicate YouTube functionalities ... but
cooler ;-)
... everything implemented in Javascript
... it will become much more complicated if we implement all the
schemes we foresee in the spec
... but the proof of concept is more important at this point
Raphael: would you mind to cc the Media Fragments WG if you
advertise this demo to the WHAT/HTML5 mailing lists ?
Silvia: no problem
Raphael: 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
... but on client side, it shows nicely what the media fragments URI
spec will enable
Silvia: I have to use a hack for caching / optimizing the media
duration and not perform look up all the time
... Mozilla guys are happy to make this feature standard anyway
... this is particular to the ogg format
... can I get approval from the group for advertizing this work to
WHAT?
Raphael: absolutely !
<davy> +1
<conrad> +1
Conrad, you're not on the phone, I need to chase you for some
actions ... pending and overdue
is there any strong constraint with this hour for you?
ACTION-90?
<trackbot> 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
<trackbot>
[32]http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/90
[32] http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/90
Davy: still pending, it is more complicated than what I thought ...
... there is service, but these are not libraries we can interface
<conrad> raphael, sorry, no strong constraint, i was delayed coming
home from work
Davy: we will use our platform, but we need to provide the interface
... for Yves's hacking
... I will write more information on the wiki page when this is done
... should be done by 17/09/2009
Wiki page:
[33]http://www.w3.org/2008/WebVideo/Fragments/wiki/ImplementationExp
eriment
[33]
http://www.w3.org/2008/WebVideo/Fragments/wiki/ImplementationExperiment
<silvia> ok
Silvia, could you add your demo on this page?
6. AOB
Is there any other business you would like to discuss?
Conrad, could you please fill
[34]http://www.doodle.com/xbw9stfdmz3pr4nw asap ?
[34] http://www.doodle.com/xbw9stfdmz3pr4nw
Raphael: we should think about the structure for the virtual meeting
<Yves> yep
Discussion: ? vs # / implementations / protocol stuff / test cases
Conrad: we need the status of your actions
... and we need to have a telecon on the protocol comparison
when can we have that?
<silvia> how is Action-69? Is it too hard to draw? would it be
better to describe?
<conrad> action 69 is not yet done
<trackbot> Sorry, couldn't find user - 69
<conrad> i have some diagrams close to that ;-)
ACTION-69?
<trackbot> 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
<trackbot>
[35]http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/69
[35] http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/69
Conrad: I have already diagrams close to that
Poll: [36]http://www.doodle.com/xbw9stfdmz3pr4nw
[36] http://www.doodle.com/xbw9stfdmz3pr4nw
it would be great if you could make one of the two time slots
[adjourned]
Summary of Action Items
[NEW] ACTION: silvia to write such a paragraph in our 2 documents,
most likely within the Terminology sections [recorded in
[37]http://www.w3.org/2009/09/02-mediafrag-minutes.html#action02]
[NEW] ACTION: Thierry to book Zakim on Th 17 and Fri 18/09, from
10:00 till 12:00 CET [recorded in
[38]http://www.w3.org/2009/09/02-mediafrag-minutes.html#action01]
[NEW] ACTION: 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
[39]http://www.w3.org/2009/09/02-mediafrag-minutes.html#action03]
[End of minutes]
--
Raphaël Troncy
EURECOM, Multimedia Communications Department
2229, route des Crêtes, 06560 Sophia Antipolis, France.
e-mail: raphael.troncy@eurecom.fr & raphael.troncy@gmail.com
Tel: +33 (0)4 - 9300 8242
Fax: +33 (0)4 - 9000 8200
Web: http://www.cwi.nl/~troncy/
Received on Wednesday, 2 September 2009 14:26:09 UTC