[whatwg] Video, Closed Captions, and Audio Description Tracks

Dave Singer singer at apple.com
Tue Oct 9 12:33:26 PDT 2007

At 12:53  +0300 9/10/07, Henri Sivonen wrote:
>On Oct 8, 2007, at 22:05, Dave Singer wrote:
>>We suggested two ways to achieve captioning (a) by selection of 
>>element, at the HTML level ('if you need captions, use this 
>Makes sense to me in case of open captions burned onto the video track.
>>and (b) styling of elements at the HTML level ('this video can be 
>>asked to display captions').
>I don't quite understand how this would work. Closed captioning 
>availability seems more like an intrinsic feature of the video file 
>and the preference to have captions rendered seems like a boolean 
>pref--not style.

Actually, I over-spoke when I said the formal word "style";  we just 
mean that the user preference for assistive material should be 
conveyed to the multimedia player and resource, after the HTML-level 
selection has happened: "Once a candidate source has been selected, 
the UA must attempt to apply the user's accessibility preferences to 
its presentation, so that adaptable content is presented 
David Singer

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