- From: David Singer <singer@apple.com>
- Date: Thu, 24 Feb 2011 11:36:40 -0800
- To: Philip Jägenstedt <philipj@opera.com>
- Cc: public-html-a11y@w3.org
On Feb 18, 2011, at 8:14 , Philip Jägenstedt wrote: > On Thu, 17 Feb 2011 23:17:41 +0100, Silvia Pfeiffer <silviapfeiffer1@gmail.com> wrote: > >> Note that I have started a page in the wiki to collect different >> rendering possibilities for multitrack video: >> http://www.w3.org/WAI/PF/HTML/wiki/Media_Multitrack_Media_Rendering >> >> My idea is that in order to understand what different display >> possibilities we have for multitrack video we have to analyse what >> people do now. I get the feeling that there are only a limited number >> of ways in which they can be displayed and we could possibly cover >> that with CSS. We also have to consider that we don't always have all >> the real estate of a Web page available to put multiple videos next to >> each other, because when the video goes full-screen it is no different >> to a TV display. So, getting inspiration from existing ways in which >> multiple video tracks are displayed should be a good idea. Please help >> with your images. >> >> If you want to contribute images but cannot upload there directly, >> feel free to email me the image and I will upload it for you. > > Thanks for collecting these, Silvia. > > Looking through the list, it's clear that all of these have a non-trivial layout of the multiple video tracks. > > For example, Mlbtv_02.jpg is a baseball video with plenty of overlayed information together with the extra video track. The extra video track has a special border that fits with the rest of the presentation. > > Transhud.jpg also has special UI around the overlayed video track, and it appears as though the many overlayed video tracks in Winclip.jpg has at least a thin black border. > > The conclusion I draw from this is that the effects "people" want are only really feasible with multiple <video> elements that are positioned and styled with CSS. In other words, for multi-track video, we need only really consider the technical solutions that link together several sibling <video> elements. I sort of agree. I think. I think that when there are visual elements in the markup, then HTML and CSS should be used to position and style them. I am not sure I agree that that means that they all have to be <video> elements. Why can't HTML+CSS handling styling and positioning of <tracks> within the <video> as well as the overall <video> element itself? David Singer Multimedia and Software Standards, Apple Inc.
Received on Thursday, 24 February 2011 19:37:44 UTC