Re: Captioning for live video

Hi Cyril,

On Fri, Dec 14, 2012 at 10:03 PM, Cyril Concolato <
cyril.concolato@telecom-paristech.fr> wrote:

>  Hi Silvia,
>
>    2. Solution in WebVTT
>>>
>>
>> Separately from WebVTT syntax issues, currently the spec does not support
>> streaming of WebVTT in <track>.
>>
>
> That's what https://www.w3.org/Bugs/Public/show_bug.cgi?id=18029 is
> about. I continue to believe that similarly to how we can stream a video
> live to a <video> element, we should be able to stream text to a <track>
> element and synchronize it from the cue time stamps.
>
> I fully agree with that. In this respect, you might be interested by the
> demo I made at MPEG back in October, showing synchronized playback of
> streamed subtitles and video in a live scenario using DASH. Details are
> here:
>
> http://concolato.wp.mines-telecom.fr/2012/12/14/live-streaming-of-video-and-subtitles-using-dash/
>

Ah this is very interesting.

I wasn't able to find this by reading your slides and the link to the demo
goes to a file on C:// : did you use JavaScript and TextTrack to feed
WebVTT cues to the browser for rendering?

Cheers,
Silvia.