- From: Leif Halvard Silli <xn--mlform-iua@xn--mlform-iua.no>
- Date: Sun, 15 May 2011 05:36:22 +0200
- To: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
- Cc: David Singer <singer@apple.com>, John Foliot <jfoliot@stanford.edu>, HTML Accessibility Task Force <public-html-a11y@w3.org>, James Craig <jcraig@apple.com>, Michael Cooper <cooper@w3.org>
Silvia Pfeiffer, Thu, 12 May 2011 10:13:48 +1000: > On Thu, May 12, 2011 at 8:48 AM, David Singer <singer@apple.com> wrote: >> On May 11, 2011, at 6:50 , Silvia Pfeiffer wrote: >>> It's a label for the video element, which in the instance of >>> non-autoplay is simply the content of the placeholder frame. So, it's >>> completely correct. +1 >> I think it should be thought of as a label for the video in the >> element, whether or not it's playing. So saying it's a poster is >> not true; that would be the correct description of an image. > > We have had the discussion in the call if it should be @alt rather > than @aria-label. I am not opposed to it. I took @aria-label by > recommendation from a blind screenreader developer. But it seems also > from today's discussion that @aria-label is a confusing attribute name > and might tend to encourage people to provide a label for the video. > Similarly, @alt may be confusing since people may want to provide a > summary of the video content, which is not what it should contain. HTML5 describes @alt as 'Replacement text for use when images are not available' [1], and it is permitted for area, img and input. What is wrong by adding <video> to that list? @alt would then remain replacement text for the video's (poster) image. @alt also plays the role of 'textual substitute' when the image is not availabel/not displayed. And a textual substitute for video is needed, for instance in textual browsers. @Aria-label cannot function as textual substitute, unless we do a lot of reprogramming etc. And a @posteralt would have the same problems. Further more, @alt would provide almost instant support in AT - since at least some of them respects @alt even on other elements than area/img/input. When it comes to the content of video@alt, then those should be described in some authoring requirement section. I think the requirements would need to vary depending on a) what the poster actually displayes, b) wheter there is telling information outside the video element. [1] http://dev.w3.org/html5/spec/index.html#attributes-1 My $2 -- Leif H Silli
Received on Sunday, 15 May 2011 03:36:53 UTC