[Ogg a11y] Presentation and some ideas

[Daniel Weck]

You could actually use SMIL timing markup to express lip-sync  
constraints:

http://www.w3.org/TR/SMIL3/smil-timing.html#Timing-ControllingRuntimeSync

Regards, Daniel

On 25 Feb 2009, at 03:55, Silvia Pfeiffer wrote:
> Synchronisation of audio and video is not as trivial as you may think.
> This is why encapsulation formats such as Ogg, QuickTime mov, MPEG
> container, etc were developed. They provide synchronisation
> information that is very important to get e.g. lipsync right.
> ...
> Therefore, the solution for your problem is not to do the
> synchronisation inside the Web browser, but to use the chosen
> container format for the video to create multi-track audio/video
> files. This works for video with audio tracks of multiple languages
> and it also works for video with sign-language tracks. In fact, this
> is the solution proposed for audio annotations (also called video
> descriptions), as well as for sign-language. (see
> https://wiki.mozilla.org/Accessibility/ 
> Video_a11y_Study08#2._Dealing_with_Non-Text_accessibility_data)