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

Dave Singer singer at apple.com
Mon Oct 8 12:06:27 PDT 2007

At 8:58  +0200 8/10/07, Charles McCathieNevile wrote:
>On Mon, 08 Oct 2007 02:14:05 +0200, Silvia 
>Pfeiffer <silviapfeiffer1 at gmail.com> wrote:
>>Hi Chris,
>>this is a very good discussion to have and I would be curious about
>>the opinions of people.
>An alternative is to use SVG as a container 
>format. You can include captions in various 
>forms, provide controls to swap between thm, and 
>even provide metadata (using some common 
>accessibility vocabulary) to describe the 
>different available tracks, and you can convert 
>common timed text formats relatively simply. For 
>implementors who already have SVG this is 
>possibly a good option.
>Loading HTML itself with everything seems like 
>overkill to me. The case where you have fallback 
>content means you can deal with some 
>semi-capable format that doesn't allow a full 
>range of accessibility options in a single 
>>I think we need to understand exactly what we expect from the caption
>>tracks before being able to suggest an optimal solution.
>Agree. I'm more likely to be involved if the 
>discussion takes place on the W3C mailing list.

which one would you like?  html, wcag, timed text, or ....?

>>On 10/8/07, Chris Double <chris.double at double.co.nz> wrote:
>>>The video element  description states that Theora, Voribis and Ogg
>>>container should be supported. How should closed captions and audio
>>>description tracks for accessibility be supported using video and
>>>these formats?
>Charles McCathieNevile  Opera Software, Standards Group
>     je parle français -- hablo español -- jeg lærer norsk
>http://my.opera.com/chaals              Try the Kestrel - Opera 9.5 alpha

David Singer

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