Re: Tech Discussions on the Multitrack Media (issue-152)

Hi Silvia, friends

Eric and I have been discussing this, and we've added an 8th option to the Wiki, for your consideration.

at <http://www.w3.org/WAI/PF/HTML/wiki/Media_Multitrack_Media_API>


On Feb 9, 2011, at 15:56 , Silvia Pfeiffer wrote:

> Everyone,
> 
> Your input on this is requested.
> 
> Issue-152 is asking for change proposals for a solution for media
> resources that have more than just one audio and one video track
> associated with them. The spec addresses this need for text tracks
> such as captions and subtitles only [1]. But we haven't solved this
> problem for additional audio and video tracks such as audio
> descriptions, sign language video, and dubbed audio tracks.
> 
> In the accessibility task force we have discussed different options
> over the last months. However, the number of people that provide
> technical input on issues related to media in the TF is fairly
> limited, so we have decided to use the available time until a change
> proposal for issue-152 is due (21st February [2]) to open the
> discussion to the larger HTML working group with the hope of hearing
> more opinions.
> 
> Past accessibility task force discussions [3][4] have exposed a number
> of possible markup/API solutions.
> 
> The different approaches are listed at
> http://www.w3.org/WAI/PF/HTML/wiki/Media_Multitrack_Media_API . This
> may be an incomplete list, but it's a start. If you have any better
> ideas, do speak up.
> 
> Which approach do people favor and why?
> 
> Cheers,
> Silvia.
> 
> [1] http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#the-track-element
> [2] http://lists.w3.org/Archives/Public/public-html/2011Jan/0198.html
> [3] http://lists.w3.org/Archives/Public/public-html-a11y/2010Oct/0520.html
> [4] http://lists.w3.org/Archives/Public/public-html-a11y/2011Feb/0057.html
> 

David Singer
Multimedia and Software Standards, Apple Inc.