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Re: Media Fragments Working Group: Agenda 17 March, Telecon 1000 UTC

From: Philip Jägenstedt <philipj@opera.com>
Date: Tue, 16 Mar 2010 22:04:34 +0800
To: "Media Fragment" <public-media-fragment@w3.org>, Raphaël Troncy <raphael.troncy@cwi.nl>, raphael.troncy@eurecom.fr
Cc: "Erik Mannens" <erik.mannens@ugent.be>
Message-ID: <op.u9nypwctatwj1d@philip-pc.oslo.opera.com>
I notice there's no action for fixing the ABNF after I removed the  
mediasegment definition and all of the *segment definitions (those with  
'=', ignoring the encoding of the name and value). I'm not sure what the  
fix is, but would really like to see this issue settled in a way that  
everyone is happy with.

The problem: It's currently completely undefined at the URI level if  
something is a valid media fragment or not. I think it should be undefined  
at this level, but that we should add the constraints on the name-value  
level. Other think differently, but we need to do it in some way.

I should be able to attend if this will be discussed (but I'd rather  
discuss it per mail, as usual).

(Certainly the semantics should be more strictly defined too, but that  
isn't a new problem.)

Philip

On Tue, 16 Mar 2010 21:15:21 +0800, Raphaël Troncy <raphael.troncy@cwi.nl>  
wrote:

> Dear Media Fragmenters,
>
> Please, find below the agenda for this week telecon  
> http://www.timeanddate.com/worldclock/fixedtime.html?day=10&month=03&year=2010&hour=10&min=00&sec=0&p1=0
> Actions opened:  
> http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/open
>
> We have 24 hours to complete more actions, so please *do*! I suggest  
> that this week, we mainly talk about the clarifying ABNF syntax of the  
> media fragments URI (Yves) + accompanying processing text from Philip in  
> order to agree on this piece. Silvia, thanks a lot for your valuable  
> input regarding the combination of multiple dimensions in the URI. I  
> suggest we made a topic for next week telecon ... where we should also  
> decide to publish another round of documents.
> Best regards.
>
> Erik & Raphaël
>
> ------------
>
> AGENDA Teleconference
> W3C Media Fragments Working Group telephone conference 2010-03-10
> -----------------------------------------------------------------
> Wednesday, 10 March *10:00-11:00 UTC*
> Local time:
> http://www.timeanddate.com/worldclock/fixedtime.html?day=10&month=03&year=2010&hour=10&min=00&sec=0&p1=0
>
> 10 March 2010, 1000 UTC
>                0200 (West US)
>                1000 (Galway)
>                1100 (Amsterdam, Sophia-Antipolis, Pretoria)
>                1900 (Tokyo)		
>                2100 (Sydney)		
> Bridge US: +1-617-761-6200 (Zakim)
> Bridge FR: +33.4.89.06.34.99
> Bridge UK: +44.117.370.6152
> Conference code : 3724# (spells "FRAG")
> Duration : 60 minutes
> -------------------------------------------------------------------
> IRC channel          : #mediafrag on irc.w3.org:6665
> W3C IRC Web Client   : http://www.w3.org/2001/01/cgi-irc
> Other clients are listed at http://www.w3.org/Project/IRC/#Client
> Zakim information    : http://www.w3.org/2002/01/UsingZakim
> Zakim bridge monitor : http://www.w3.org/1998/12/bridge/Zakim.html
> Zakim IRC bot        : http://www.w3.org/2001/12/zakim-irc-bot.html
> -------------------------------------------------------------------
>
> Chair: Raphael, Erik
> ScribeList: http://www.w3.org/2008/WebVideo/Fragments/wiki/ScribeList
> Scribe: Conrad (On Deck: Silvia, Michael)
> Regrets:
>
> Please note that Media Fragments WG telecons are for attendance by
> members and invited experts only.
>
> 1. ADMIN:
> * Roll call
> * PROPOSED to accept the minutes of the 03 March 2010 telecon:
> http://www.w3.org/2010/03/03-mediafrag-minutes.html
> * PROPOSED to accept the minutes of the 5th F2F meeting:
> http://www.w3.org/2010/03/08-mediafrag-minutes.html
> http://www.w3.org/2010/03/09-mediafrag-minutes.html
>
> * ACTION-119: Yves to request admins to set up a cvs notifications  
> mailing list and notifications
> * ACTION-92: Erik and Raphael to coordinate the writing of papers
> ** Postpone (new deadline is May 1st 2010)
>
> * Next WG F2F:
>   - 25-30 April in Raleigh, collocated with WWW (HTML5 Track?)
>   - 01-03 June in Heraklion, collocated with ESWC
>   - 14-16 June in Sophia Antipolis/Amsterdam
>   - 25-26 or 28-29 June in New York, collocated with FOMS+OVC
>
> 2. USE CASES & REQUIREMENTS
>
> * ACTION-156: Conrad to add a "bandwidth conservation use case"
>
> 3. SPECIFICATION:
>
> 3.1 Media Fragment URI syntax: (Yves)
>
> * ACTION-151: Yves to modify the production rule for the track dimension  
> in order to allow multiple semi-colon separated values
> * ACTION-152: Yves to change the formal syntax to reflect that we don't  
> need a subdelim for selecting multiple tracks but we allow multiple  
> track= in the URI
> * ACTION-153: Raphael to review the complete document and check whether  
> there are more references to uniqueness
>
> 3.2 Protocol for URI fragment Resolution in HTTP:
> * ACTION-123: Yves to come up with ABNF for header syntax
> * ACTION-154: Yves to add a section 5.2.4 describing his new optimization
> * ACTION-137: Jack to check that 5.1 is implementable using the protocol
> * ACTION-155: Davy to draw diagrams to include in the spec, similar to  
> Yves's email, that shows which bytes from the headers and body of the  
> media file are sent
>
> 3.3 Rendering of Media Fragments URI in UA:
> * ACTION-135: Davy, Erik to extend section 7 regarding spatial and track  
> dimension
> * ISSUE-5 [Jack]: Handling spatial cropping requires information at
> client-side
>
> 3.4 Discovery of 'Track' and 'Named' fragments:
> * ISSUE-4 [Silvia]: Should we pre-define some track names?
> * Davy's strawman implementation using ROE:
> http://lists.w3.org/Archives/Public/public-media-fragment/2009Nov/0014.html
> * Silvia's blog post:
> http://blog.gingertech.net/2009/11/25/manifests-exposing-structure-of-a-composite-media-resource/  
> * Jack's proposal to write up that we should distinguish the mechanism  
> (ROE, MPEG-21) vs the semantics
>
> 4. TEST CASES: (Michael)
> * Corrib test tool: http://ld2sd.deri.org/corrib/
> * ACTION-146: Jack to identify and add in corrib any missing test cases  
> for temporal fragments 	
> * ACTION-158: Raphael to enter the big table of all test cases for the  
> temporal dimension in the wiki
> * ACTION-147: Michael to add all MF WG members to corrib
> * ACTION-148: Michael to add a copy TC functionality in corrib
> * ACTION-149: Michael to come up with a fix for overview vs. edit single  
> TC in corrib
> * Suggestion of nasty test cases by Philip:
> http://lists.w3.org/Archives/Public/public-media-fragment/2009Dec/0015.html
>
> 5. ISSUES
>
> 5.1 Active:
>
> 5.2 Non-Active:
> * ISSUE-6 [Jack]: Temporal clips that require transcoding
> * ISSUE-7 [Michael]: User Agent Media Fragment Resolution and Processing
> * ISSUE-9 [Michael]: Should we have the media type inside the Test Cases?
> * ISSUE-12 [Raphael]: What's the relationship between Images (CSS)  
> Sprites and the spatial dimension of the Media Fragments URI scheme?
> * ISSUE-13 [Raphael]: Write a IETF draft for proposing how to register  
> the fragment scheme for all media types
> * ISSUE-14 [Davy]: How to deal with embedded time stamps
> * ISSUE-16 [Jack]: Combining axis is probably not going to be done by  
> LC, but we should write somewhere that this is doable
>
> 6. IMPLEMENTATION:
> * ACTION-34: Jack to look at python-url library to see whether he could
> implement the logic on client side
> * ACTION-35: Raphael to look at curl and/or wget to see whether the  
> logic could be implemented on client side
> * ACTION-70: Jack to commit in CVS (code directory) his python code  
> doing the parsing on client side of the media fragment
> * Someone to investigate whether he could have an implementation in  
> Javascript that does the client-side media fragments parsing?
>
> 7. AOB
>


-- 
Philip Jägenstedt
Core Developer
Opera Software
Received on Tuesday, 16 March 2010 14:05:35 GMT

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