- From: Kazuyuki Ashimura <ashimura@w3.org>
- Date: Sat, 13 Aug 2011 06:21:52 +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 12:15:48 +0000 Resent-From: public-web-and-tv@w3.org Date: Wed, 10 Aug 2011 13:15:09 +0100 From: Scott Wilson <scott.bradley.wilson@gmail.com> To: Cyril Concolato <cyril.concolato@telecom-paristech.fr> CC: public-web-and-tv@w3.org On 10 Aug 2011, at 12:19, Cyril Concolato 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]). Well, right now you could use a <track> pointing to an SVG file if you wanted to. I don't think thats a significant restriction. The real question is - will browsers implement support for SVG documents linked in <track> elements, or just WebVTT/Subrip formatted synchronized text files? And what about SMIL[1]? [1] http://www.w3.org/TR/SMIL/ > >> Just like you cannot put a SVG into a<audio> or<video> >> element, you won't be able to put a SVG into a<track> element. > That's a separate issue on which we could also argue. > > Regards, > > cyril > > [1] http://gpac.sf.net > [2] http://biblio.telecom-paristech.fr/cgi-bin/download.cgi?id=10647 > -- > Cyril Concolato > Maître de Conférences/Associate Professor > Groupe Multimedia/Multimedia Group > Telecom ParisTech > 46 rue Barrault > 75 013 Paris, France > http://concolato.wp.institut-telecom.fr/ >
Received on Friday, 12 August 2011 21:21:28 UTC