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Re: Media--Technical Implications of Our User Requirements

From: Eric Carlson <eric.carlson@apple.com>
Date: Wed, 14 Jul 2010 14:59:00 -0700
Message-Id: <0BA315F1-0762-46B5-9DBB-3B7A35CFB350@apple.com>
To: "HTML Accessibility Task Force" <public-html-a11y@w3.org>
On Wed, July 14, 2010 2:06 pm, Janina Sajka wrote:
> Eric Carlson writes:
>> On Jul 13, 2010, at 8:51 PM, Janina Sajka wrote:
>>  To me, "synchronize all media representations" means the data file
>> will be used to control the *playback* of the media file. Is this what
>> you intended, or is the data file supposed to be used to allow
>> *navigation* of the media file?
> It has to be achieved somehow, of course. And, however it's achieved,
> whatever alternative media representations are selected must track with
> the default content.
Apologies but I still don't understand what "synchronize all media
representations" means. Does it mean the data file controls playback or

> It does also seem to me that the playback control data file should
> contain structural nav points as well. In fact, it seems Ian is trending
> in this direction:
> http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#the-track-element
Yes, this is all based on the multi-track stuff Silvia and I wrote earlier
this year.

Received on Wednesday, 14 July 2010 21:59:33 UTC

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