W3C home > Mailing lists > Public > public-html-a11y@w3.org > April 2011

Re: text track associations

From: Ian Hickson <ian@hixie.ch>
Date: Tue, 12 Apr 2011 00:02:54 +0000 (UTC)
To: Sean Hayes <Sean.Hayes@microsoft.com>
cc: Silvia Pfeiffer <silviapfeiffer1@gmail.com>, Mark Watson <watsonm@netflix.com>, Eric Carlson <eric.carlson@apple.com>, "public-html-a11y@w3.org" <public-html-a11y@w3.org>
Message-ID: <Pine.LNX.4.64.1104120002280.19153@ps20323.dreamhostps.com>
On Fri, 8 Apr 2011, Sean Hayes wrote:
> In a multitrack API, since caption tracks are essentially the audio for 
> Deaf and HoH use, we will need some way for these to follow the selected 
> audio asset.
> If I have a presentation, with the option of switching to different a 
> different audio resource (e.g director commentary which is longer, 
> starts before and ends after the main movie). The captions for it need 
> to be timed to the commentary audio, and so if it's in a markup element, 
> live in that element. If the user has captions turned on and wants the 
> commentary audio, then the captions for the commentary soundtrack will 
> need to replace the captions for the original audio track, and render 
> into the rectangle allotted for the main video.
> I'm not seeing how I would create this.

Use <video> element for the commentary audio, with the appropriate 
captions specified, and layer it on top of the main <video>.

Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'
Received on Tuesday, 12 April 2011 00:03:17 UTC

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