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

From: <bugzilla@jessica.w3.org>
Date: Fri, 01 Oct 2010 09:03:17 +0000
To: public-html-a11y@w3.org
Message-Id: <E1P1bWP-0002m9-Gl@jessica.w3.org>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=10642

--- Comment #27 from Ashley Ward <ash@netality.com> 2010-10-01 09:03:14 UTC ---
(In reply to comment #26)
> This
> also applies to the first frame displayed if no explicit poster frame is
> provided. Since it's either this first frame or the explicitly linked image,
> covering them both the same way makes sense.

The trouble with providing poster alt text when no explicit poster image is
given is that we can't be sure that the UA will choose the first frame. It may
choose the middle frame, or the first non-blank frame.

If the poster alt text is given but it does not match the UA chosen poster
image then this is probably worse than having no alt text at all (although not
being an AT user myself I'm happy to be corrected!)

The only way around this, I suppose, would be to specify the exact algorithm
for choosing an automatic poster frame, but I'm certain that's a bad idea!

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Received on Friday, 1 October 2010 09:03:19 GMT

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