Media Fragments Working Group: Agenda 9 September, Telecon 1200 UTC

Dear Media Fragmenters,

We have an exciting telecon coming, the last one before our virtual F2F 
meeting. Please, find below the agenda for this week telecon: 

Jack will _really_ scribe this time (Yves is on deck).
Actions opened:
Best regards.

   Erik & RaphaŽl


AGENDA Teleconference
W3C Media Fragments Working Group telephone conference 2009-09-09
Wednesday, 09 September *12:00-13:00 UTC*
Local time: 

09 September 2009, 1200 UTC
              0500 (West US)
              1300 (Galway)
              1400 (Amsterdam, Sophia-Antipolis, Pretoria)
              2100 (Tokyo)
              2200 (Sydney)
Bridge US: +1-617-761-6200 (Zakim)
Bridge FR: +
Bridge UK: +44.117.370.6152
Conference code : 3724# (spells "FRAG")
Duration : 60 minutes
IRC channel          : #mediafrag on
W3C IRC Web Client   :
Other clients are listed at
Zakim information    :
Zakim bridge monitor :
Zakim IRC bot        :

Chair: Raphael, Erik
Scribe: Jack (On Deck: Yves)
Regrets: Silvia

Please note that Media Fragments WG telecons are for attendance by
members and invited experts only.

* Roll call
* PROPOSED to accept the minutes of the 02 September 2009 telecon:
* Next WG gathering:
   - 17-18 September: Virtual Meeting, see the agenda at
   - 2-6 November: TPAC week in Santa Clara (CA, USA)?
* ACTION-92: Erik and Raphael to coordinate the writing of papers
(ongoing ... re-raise around 15/09/09)

* ACTION-95: Michael to review ALL UC with a mobile hat on and check
whether these sufficiently cover the mobile usage
* ACTION-101: Yves to write a UC describing the use of aspect ratio
feature, and thus motivating its usage
* Use Cases and Requirements WD review:
   - Updates from MAWG:
   - TAG: Yves ... re-raise around 01/09/09


3.1 Terminology: (Silvia)
* ACTION-103: Silvia to write a paragraph in our 2 documents, most
likely within the Terminology sections, explaining that when we say URI,
we mean URI Ref
Done: see

3.2 Syntax: (Yves)
* ACTION-49: Yves to Draft the HTTP-Range syntax for different units
(completing all the syntax for the two way handshake) (ongoing ...
re-raise around 01/09/09)

3.3 UA Server HTTP Communication (Conrad/Raphael)
* ACTION-69: Conrad to draw a representation of the general structure of
a media resource, for streamable formats
* ACTION-104: 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 ?

4. TEST CASES: (Michael)
* Corrib test tool:
* Michael: we need to carefully define the three different error cases:
undefined/wrongly defined/not present; Might renumber the TC; See
whether the TC could be put into a table (with support from a
programmatic tool).
* ACTION-93: Michael to revisit the TC and see which are affected by the


5.1 Active:
* ISSUE-9 [Michael]: Should we have the media type inside the Test Cases?
** ACTION-82: Michael to flesh out TC vocabulary re ISSUE-9
* ISSUE-6 [Jack]: Temporal clips that require transcoding
** ACTION-62: Yves to ask the TAG whether transcoding should be
forbidden or not when we send a fragment of a resource
** Done:
(+ thread). How to restart the discussion? Ask Noah to have an item
during the next call?

5.2 Non-Active:
* ISSUE-4 [Silvia]: Should we pre-define some track names?
* ISSUE-5 [Jack]: Handling spatial cropping requires information at
* ISSUE-7 [Michael]: User Agent Media Fragment Resolution and Processing
* 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

* 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
* ACTION-71: Michael to investigate whether he could have an
implementation in Javascript that does the client-side media fragments
* ACTION-90: Davy to provide a pointer to Yves to a lib he can use to
slice media files

7. AOB

RaphaŽl Troncy
CWI (Centre for Mathematics and Computer Science),
Kruislaan 413, 1098 SJ Amsterdam, The Netherlands
e-mail: &
Tel: +31 (0)20 - 592 4093
Fax: +31 (0)20 - 592 4312

Received on Tuesday, 8 September 2009 09:46:14 UTC