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Re: Equivalents (was Re: Multilanguage alt/title)

From: Marghanita da Cruz <marghanita@ramin.com.au>
Date: Thu, 30 Aug 2007 16:57:10 +1000
Message-ID: <46D66A46.2030605@ramin.com.au>
To: Maciej Stachowiak <mjs@apple.com>
CC: Sander Tekelenburg <st@isoc.nl>, public-html@w3.org

Maciej Stachowiak wrote:
> On Aug 29, 2007, at 8:35 PM, Sander Tekelenburg wrote:
>> At 19:27 -0700 UTC, on 2007-08-29, Maciej Stachowiak wrote:
>>>> On Aug 29, 2007, at 7:41 PM, Maciej Stachowiak wrote:
>> [... Re <http://esw.w3.org/topic/HTML/ObjectSupport>]

>> [...]
>>> I think the HTML5 recommendation will be to use <audio> and <video>
>>> for audio and video when possible. These provide for fallback content.
>> Fallback, yes. But equivalents? The current HTML5 draft speaks very
>> specifically of fallback only, and seems to mean <video><a 
>> href="URL">click
>> here</a></video>.
> What would make the most sense to me is something like:
> <video type="video/mp4" src="lolcat.m4v">
> <object type="video/mp4" data="lolcat.m4v">
> ... text equivalent goes here, if needed ...
> </object>
>  </video>
> However, a video file may have optional caption tracks and/or 
> descriptive audio, so a text equivalent may not be necessary for 
> accessibility.
Not commenting on the proposed markup or language, but testing the functionality:

 From a browsing perspective, Text equivalent would be helpful in deciding 
whether to download the video or not.

Is streaming or download a function of the server/filetype or should that be
specified in the filetype.

It would also be useful to be able to specify a choice of 
languages/mono/stereo/video quality (preview, mobile phone vs home theatre) etc
in associated audio tracks, text descriptions
and maybe even sub-titling (in multiple languages/scripts).

Is there some kind of support for synchronising independent files of text, audio
and video - or is the idea to rely on AVI, SMIL or OGG for this?

How will captioning for hearing rather than visually impaired be supported. In 
the TV broadcast arena there are currently competing standards for captioning.

Would all the functionality available on DVDs (alternate audio/directors 
comments/sub-titling) be possible on a webpage - bearing in mind that ideally 
only required components will be downloaded?

Marghanita da Cruz
Phone: (+61)0414 869202
Received on Thursday, 30 August 2007 06:58:45 UTC

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