- From: <bugzilla@jessica.w3.org>
- Date: Mon, 15 Nov 2010 08:44:13 +0000
- To: public-html-a11y@w3.org
http://www.w3.org/Bugs/Public/show_bug.cgi?id=10642 --- Comment #78 from Silvia Pfeiffer <silviapfeiffer1@gmail.com> 2010-11-15 08:44:10 UTC --- (In reply to comment #77) > (In reply to comment #76) > > I do not follow your argument for why they need to be separate. The purpose of > > the poster or displayed video frame is to express something that will make > > people want to watch the video. It is therefore not distinct, even it if > > contains content that is not in the video. > > It is distinct, in that it is presented before the video itself would be > played. When there is no @poster, there is also an image that is presented before the video is played. It makes no sense not to have a description for that either. They are both part of the video experience and therefore logically part of the video's text alternative. > I can see a definite advantage to having the poster's alternate text > specified separately from the video content's: it allows the poster alternate > text to be queried separately. That would be the only reason why I could see a necessity for a separate @posteralt, as I said before. But I honestly cannot see a use case where it would be necessary to have the @poster attribute's display retrieved separately from the user when it is part of the video (of course it would be required when it was displayed separately in an <img>, but that's not the case here). In particular can I not see this additional alternative representation of the video being read out by the screen reader. > This would in fact bring the experience closer > to that of the sighted user, namely, that the poster can be presented > separately first, enticing the user to play the video. > > Of course it may be that the first few sentences of the video content's > alternate text does this job. But it may not. So, let's think this through. What would realistically be in a @posteralt that would not be in a normal @alt (or @aria-label) for a video? The @alt would realistically contain a description of the image being shown as a replacement for the video. What else? It cannot provide a summary of the video, since that would be more than the sighted user gets. That kind of content would come through a @aria-describedby or the time-synchronized video description track that we are preparing for. So, realistically, the @alt (or @aria-label) contains exactly what the @poster shows. Nothing more and nothing less. -- Configure bugmail: http://www.w3.org/Bugs/Public/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
Received on Monday, 15 November 2010 08:44:15 UTC