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[Bug 10642] No alternative text description for video key frame (poster)

From: <bugzilla@jessica.w3.org>
Date: Thu, 14 Oct 2010 08:15:00 +0000
To: public-html-a11y@w3.org
Message-Id: <E1P6Ixo-0008Ol-B2@jessica.w3.org>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=10642

--- Comment #56 from Silvia Pfeiffer <silviapfeiffer1@gmail.com> 2010-10-14 08:14:57 UTC ---
(In reply to comment #53)
>
> So, probably this is better:
> 
> <video src="video.ogv" poster="image.png" alt="Ian Hickson - editor of
>  HTML5 spec" aria-label="a video about HTML5" controls>
> </video>

Sorry for the typo, I meant:

<video src="video.ogv" poster="image.png" posteralt="Ian Hickson - editor of
HTML5 spec" aria-label="a video about HTML5" controls>
</video>

or alternatively

<video src="video.ogv" poster="image.png" posteralt="Ian Hickson - editor of
HTML5 spec" alt="a video about HTML5" controls>
</video>

Use of @alt for an alternative short description of the video is common for
other elements, so we shouldn't break that here.

I've also briefly spoken with a blind person who is doing development on screen
readers and they thought it reasonable to have two alt texts, one for the video
and one for the poster, since they provide potentially differing information
(if the poster is available). But it was accepted as a pedantic difference and
unsure if it would be worth the effort.

Maybe it would be possible to encourage users to explain the poster content in
the @alt attribute, too, e.g.

<video src="video.ogv" poster="image.png" alt="a video about HTML5, poster
showing Ian Hickson - editor of HTML5 spec" controls>
</video>

We do, however, need to agree on what the attribute is for alternative short
description for video - is it @alt or is it @aria-label - or something
completely different?

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Received on Thursday, 14 October 2010 08:15:01 GMT

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