W3C home > Mailing lists > Public > public-html@w3.org > March 2012

Re: CP, ISSUE-30: Link longdesc to role of img [Was: hypothetical question on longdesc]

From: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
Date: Thu, 22 Mar 2012 08:32:48 +1100
Message-ID: <CAHp8n2n7NiPd-MkYUoHaeRnYAc7BH0c+fSTk-Q9afxS42Ljaow@mail.gmail.com>
To: David Singer <singer@apple.com>, Sean Hayes <Sean.Hayes@microsoft.com>, John Foliot <john@foliot.ca>, Silvia Pfeiffer <silviapfeiffer1@gmail.com>, "'xn--mlform-iua@målform.no'" <xn--mlform-iua@xn--mlform-iua.no>, "rubys@intertwingly.net" <rubys@intertwingly.net>, "laura.lee.carlson@gmail.com" <laura.lee.carlson@gmail.com>, "mjs@apple.com" <mjs@apple.com>, Paul Cotton <Paul.Cotton@microsoft.com>, "public-html-a11y@w3.org" <public-html-a11y@w3.org>, "public-html@w3.org" <public-html@w3.org>
On Thu, Mar 22, 2012 at 7:59 AM, janina@rednote.net <janina@rednote.net> wrote:
> David Singer writes:
>> Or we simply say the obvious "If the image is not a representative frame of the video, or conveys information in addition to the content of the video, then a description of that information must also be included with the description(s) of the video that are supplied for accessibility (e.g. alt, longdesc, transcript, etc.)."
> A description of the video is not the same thing as a description of a
> rich image that is published to stand for the video.
> It's not a video until the video is running. Until then it's an icon for
> the video, or a poster for the video, or the magic doo-hickie that tells
> you something about the video (or not).
> Two different things, semantically disparate. Therefore, they obviously
> need semantically distinct description. This should be obvious, but it
> seems it isn't. So, consider that concattinating these two functions,
> whether in one's own mind or in the markup that provides access, is
> unacceptable.

I disagree. It's a video already even if it's not playing. We have the
possibility to put a video with a time offset (ANY time offset) into
the video element and it will be paused and what you will see is the
video frame that is at that time offset and it's paused. That is the
same display as when using a poster. In fact, in this situation, the
@poster will not be displayed at all, and therefore any description of
the poster as a replacement for the video will fail, because the
displayed frame is not the poster.

Received on Wednesday, 21 March 2012 21:33:42 UTC

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