W3C home > Mailing lists > Public > public-media-fragment@w3.org > August 2009

Re: Fwd: [whatwg] Remove addCueRange/removeCueRanges

From: Raphaël Troncy <Raphael.Troncy@cwi.nl>
Date: Sat, 22 Aug 2009 16:21:12 +0200
Message-ID: <4A8FFED8.4080102@cwi.nl>
To: Philip Jägenstedt <philipj@opera.com>
CC: Silvia Pfeiffer <silviapfeiffer1@gmail.com>, Media Fragment <public-media-fragment@w3.org>
> In my opinion that is completely a UI design choice. My personal 
> preference is that ?query resources should be aligned to zero (ignoring 
> skeleton headers) and that #fragment resources should display the full 
> time-line with the ability to seek outside the specified range. 
> Different browsers will experiment with different solutions and if the 
> author isn't happy she/he could use a script-based interface more to 
> her/his liking.

A big +1.

>> An issue with any of our existing specs with fragments (#) that just
>> occurred to me is: if the retrieval action only retrieves the
>> specified segment, the browser has no way to figure out the length
>> (start/duration) of the original resource. Maybe we need to introduce
>> additional headers that would provide for that?
> That might help, but I don't really understand how this special 
> retrieval action is going to work yet.

This issue has been solved during our last telecon. A response to a 
range request contains additionally the total length of the parent 
resource, so the UA will have "in hand" the bytes corresponding to the 
fragment it has requested _on_ the total duration of the parent 
resource, so the UA can display the full time-line, play only the 
fragment, and allow a user to seek outside.


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 Saturday, 22 August 2009 14:22:19 UTC

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