- From: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
- Date: Sat, 9 Apr 2011 20:22:17 +1000
- To: Sean Hayes <Sean.Hayes@microsoft.com>
- Cc: David Singer <singer@apple.com>, Mark Watson <watsonm@netflix.com>, Eric Carlson <eric.carlson@apple.com>, Ian Hickson <ian@hixie.ch>, "public-html-a11y@w3.org" <public-html-a11y@w3.org>
On Sat, Apr 9, 2011 at 5:01 AM, Sean Hayes <Sean.Hayes@microsoft.com> wrote: > Yes they will share a timeline once they are glued together, that's only one of the issues here. They will also need to share a display space. I want to see how this example would be marked up using the 'controller' model. Do I put the director captions inside the <audio> that is the director commentary? If so, how do they show up in the other video space. If not, what information does the UA use to associate the second caption track with the remote audio element? > > For example: > <video id=vid mediagroup=set src=mainvideo.vid > > <track kind=captions id=main> > </video> > > <audio mediagroup=set src=director.aud > > <track kind=captions id=director> > </audio> > > how do captions.director end up getting displayed in video.vid? > As it stands right now, in this example, the captions in the audio track are not displayed, so have to be mapped onto the screen through the JavaScript API. So, you can create a display area that matches where you want to place them and you can make it replace the main captions. This is acceptable for complex situation, IMHO. However, we have a similar issue with captions for audio description tracks, which should probably be more commonly displayed as an alternative or addition to the normal captions. I'd probably encourage the Web author to add that in another track with the full transcript of both the captions and audio descriptions as you did in the example below: > Alternately if I do: > <video id=vid mediagroup=set src=mainvideo.vid > > <track kind=captions id=main> > <track kind=captions id=director> > </video> > > <audio mediagroup=set src=director.aud > > </audio> > > Then how do I prevent the director captions being offered as an option for the ordinary video until the second audio is selected? In the case of the director's track, I'd probably prefer the above markup. For audio descriptions probably this one and then it's fine when both the captions and audio descriptions are displayed because they would occupy different times anyway. Cheers, Silvia.
Received on Saturday, 9 April 2011 10:23:04 UTC