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RE: Track fragments

From: Davy Van Deursen <davy.vandeursen@ugent.be>
Date: Tue, 16 Feb 2010 09:09:56 +0100
To: "'Conrad Parker'" <conrad@metadecks.org>, "'DENOUAL Franck'" <Franck.Denoual@crf.canon.fr>
Cc: <public-media-fragment@w3.org>
Message-ID: <000f01caaedf$6d9016a0$48b043e0$@vandeursen@ugent.be>
Hi Conrad,

On feb 16, 2010 at 01:16, Conrad Parker wrote:
> Cc: public-media-fragment@w3.org
> Subject: Re: Track fragments
> On 16 February 2010 02:01, DENOUAL Franck 
> <Franck.Denoual@crf.canon.fr>
> wrote:
> > Dear fragmenters,
> >
> > Some time ago, there were discussions on defining default tracks or
> not...
> > Also related to the track dimension, wouldn't it be interesting to
> have the possibility to directly address multiple tracks ?
> >
> > Suppose a multimedia presentation containing one video stream with
> different audio streams (english, german, french,...) and one would 
> like to get the video stream with the english version of the audio 
> stream.
> > This is not possible with current track dimension even with the
> composition operator "&" since track allows the extraction of a single 
> track.
> I think that particular case -- selecting the language representation 
> of the resource -- is better handled by the existing Accept- 
> Language/Content-Language mechanism.
> The fragment addressing case that Silvia has suggested would be for 
> more complex scenarios, such as a language learner explicitly 
> selecting particular audio and subtitle tracks, or an editing 
> application that needs to display/hide particular tracks during preview.

We have scenarios where media resources consist of multiple video tracks
(i.e., low to high quality versions) and multiple audio tracks (i.e.,
different languages). In this case, we have to be able to address two tracks
in order to obtain a meaningful audio/video combination. I agree that the
content negotiation solution for audio language tracks is a nice solution,
but this only works in the case that different audio tracks correspond to
different languages.

Best regards,


Davy Van Deursen

Ghent University - IBBT
Department of Electronics and Information Systems - Multimedia Lab
URL: http://multimedialab.elis.ugent.be/dvdeurse
Received on Tuesday, 16 February 2010 08:10:00 UTC

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