[Bug 12794] [video] Add a non-normative note on how to provide text alternatives for media elements


--- Comment #2 from Silvia Pfeiffer <silviapfeiffer1@gmail.com> 2011-05-27 02:50:20 UTC ---
(In reply to comment #1)
> I think the suggested example doesn't work since the paragraphs are descendants
> of <video> and thus not rendered (like display:none) and not present in the
> accessible tree. Correct me if I'm wrong.

Excellent, this is what I want to find out: can we make it work.

IIUC the descendant paragraphs in <video> are in the DOM, but not rendered.
Does that mean that the browsers mark them with display:none or @hidden and
therefore they don't go through to the accessible tree, or are they marked
differently? I'm asking because it would be a simple way to provide non-visible
accessible text on the page, similar to what Jonas indicated may be possible to
introduce for pointing aria-describedby to hidden elements.

> Also, wouldn't the summary, transcript, and description be useful for all
> users?

If they are, the author can, of course, put them on the page and the
aria-describedby would point to the visible paragraph. However, with
aria-describedby it is always the challenge how to describe to a blind user
what is on the page without having to expose that text also to the sighted
users. Therefore I picked this more challenging example.

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Received on Friday, 27 May 2011 02:50:23 UTC