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Fwd: Re: [MEDIA_PIPELINE_TF] ISSUE-37: ViewPort-Support

From: Kazuyuki Ashimura <ashimura@w3.org>
Date: Sat, 13 Aug 2011 06:20:45 +0900
Message-ID: <4E45992D.2060007@w3.org>
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 10:09:21 +0000
Resent-From: public-web-and-tv@w3.org
Date: Wed, 10 Aug 2011 11:08:49 +0100
From: Scott Wilson <scott.bradley.wilson@gmail.com>
To: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
CC: Cyril Concolato <cyril.concolato@telecom-paristech.fr>, public-web-and-tv@w3.org


On 10 Aug 2011, at 10:46, Silvia Pfeiffer wrote:

> 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. 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.
>
> However, we can e.g. create a WebVTT file with data in the cues that
> point to SVG files or whatever else we want to time-align with the
> video and link that in the <track> @src with @kind=metadata.


Right, so we would need a WebVTT cue node type for such a link to the SVG or whatever. Maybe a HTML <a> or <link> tag.

However I think a major point of WebVTT is it is simple to create and to parse tracks, which is why it has such a restricted document model, so we should be parsimonious in extending the spec.

>
> Cheers,
> Silvia.
>
Received on Friday, 12 August 2011 21:20:27 UTC

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