- From: Kazuyuki Ashimura <ashimura@w3.org>
- Date: Sat, 13 Aug 2011 06:22:06 +0900
- To: TV and WEB <public-web-and-tv@w3.org>
forwarding to archive with proper ISSUE ID (ISSUE-37) -------- Original Message -------- Subject: Re: [MEDIA_PIPELINE_TF] ISSUE-34: ViewPort-Support Resent-Date: Wed, 10 Aug 2011 23:48:33 +0000 Resent-From: public-web-and-tv@w3.org Date: Thu, 11 Aug 2011 09:47:45 +1000 From: Silvia Pfeiffer <silviapfeiffer1@gmail.com> To: Cyril Concolato <cyril.concolato@telecom-paristech.fr> CC: public-web-and-tv@w3.org On Wed, Aug 10, 2011 at 9:19 PM, Cyril Concolato <cyril.concolato@telecom-paristech.fr> wrote: > Sylvia, > > Le 10/08/2011 11:46, Silvia Pfeiffer a écrit : >> >> On Wed, Aug 10, 2011 at 5:22 PM, Cyril Concolato >> <cyril.concolato@telecom-paristech.fr> wrote: >>> >>> Hi Sylvia, >>> >>> Le 10/08/2011 02:38, Silvia Pfeiffer a écrit : >>>> >>>> I wonder if instead it might be worth analysing if we can come up with >>>> a<track> kind that allows overlaying hyperlinkable regions onto the >>>> video? >>> >>> Why wouldn't it be possible to have a track element point to some >>> animated >>> SVG file? >> >> The<track> element points to timed text, i.e. to a file that provides >> text fragments along the timeline of the video. SVG is not suitable >> for that use. > > The fact that the spec puts a restriction is one aspect. I would be happy to > know the rationale for it. But I think such restriction however could be > removed. From an implementation point of view, we've done it in GPAC [1], it > perfectly makes sense to consider SVG as an additional track to a > video/audio media. It can be used for subtitling (yet another format), > animated graphics (think about dynamic and synchronized ads, ...), regions > of interests (See for example [2]). Can you fill the TextTrack object and the cues from a SVG? As long as you can make a mapping, it's possible. If the format doesn't fit with the elements, then it's an orthogonal concept that won't fit the bill. In my understanding, SVG has a complex DOM that goes far beyond what TextTrack is capable of representing. So, I think it's too rich a format for the feature. Of course you can always throw any format at a HTML element. However, if browsers don't support it, you can only deal with it through JavaScript - so it's not a standardised feature and not really relevant to the W3C. Cheers, Silvia.
Received on Friday, 12 August 2011 21:21:41 UTC