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Tech Discussions on the Multitrack Media (issue-152)

From: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
Date: Thu, 10 Feb 2011 10:56:19 +1100
Message-ID: <AANLkTik5ePpj3cM0jPz==bAOgid2e2OYNTAtGWoboeXt@mail.gmail.com>
To: public-html <public-html@w3.org>
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
Received on Wednesday, 9 February 2011 23:57:12 UTC

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