Re: Embedding the track kind in WebVTT files

Currently I can see only "SUBTITLES" but not exactly which subtittle. Do
you have plan to suggest this to have particular field type of subtitle
webvtt or websrt or ttml. Do you have plan to propose to HLS spec?

I am already using webvtt with HLS.

With Regards,
Sunil
 On 12-Sep-2013 6:44 PM, "Goldstein, Glenn" <glenn.goldstein@viacom.com>
wrote:

> i am all for this, thanks cyril.
>
> on a related note, it would be helpful if the HLS manifest enabled
> differentiation by kind (subtitles vs captions). current pantos spec only
> has a TYPE value of "SUBTITLES".
>
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> On 9/12/13 5:30 AM, "Cyril Concolato"
> <cyril.concolato@telecom-paristech.fr> wrote:
>
> >Hi all,
> >
> >WebVTT files are/will be used in environments where there might not be
> >an HTML page pointing to it. Some examples are:
> >- WebVTT content embedded and multiplexed with video and audio in an MP4
> >file
> >- Plain text WebVTT files referenced by an adaptive streaming manifest
> >(DASH MPD, HLS playlist, ...)
> >
> >All embedding environments typically enable marking a track with a
> >language (e.g. an audio track) but not all can carry the kind types
> >(subtitles, captions, metadata). In order to avoid losing that
> >information in those environments, I think the WebVTT file should
> >declare its kind. Also, when producing WebVTT files, it should be
> >possible to indicate the language, kind or even label in the file
> >itself, to avoid mistakes.
> >
> >I would like to propose to define standard WebVTT metadata headers, as
> >follows:
> >- WebVTT metadata header name: kind
> >- WebVTT metadata header value: as defined by kind attribute of the
> >track element in the HTML 5 specification
> >
> >- WebVTT metadata header name: language
> >- WebVTT metadata header value: as defined by srclang attribute of the
> >track element in the HTML 5 specification
> >
> >- WebVTT metadata header name: label
> >- WebVTT metadata header value: as defined by label attribute of the
> >track element in the HTML 5 specification
> >
> >Note that some people are already using non standard name/values for
> >that (e.g.
> >
> http://wiki.webmproject.org/webm-metadata/temporal-metadata/webvtt-metadat
> >a)
> >
> >Of course, this introduce redundancy when the embedding environment also
> >sets those attributes and might be problematic if the values differ.
> >Resolving conflicts should be specified by the embedding environment. In
> >HTML, the information in the HTML page should probably have precedence,
> >to be able to use a caption track as metadata, if the HTML author wants
> >to.
> >
> >Comments ?
> >
> >Regards,
> >Cyril
> >
> >--
> >Cyril Concolato
> >Maître de Conférences/Associate Professor
> >Groupe Multimedia/Multimedia Group
> >Telecom ParisTech
> >46 rue Barrault
> >75 013 Paris, France
> >http://concolato.wp.mines-telecom.fr/
> >
> >
>
>
>