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[Bug 13359] A way is needed to identify the type of data in a track element

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Date: Thu, 03 Nov 2011 21:36:35 +0000
To: public-html-bugzilla@w3.org
Message-Id: <E1RM4xf-0001Es-KA@jessica.w3.org>

--- Comment #21 from Ian 'Hixie' Hickson <ian@hixie.ch> 2011-11-03 21:36:35 UTC ---
So the use case here is that there are in-band streams, e.g. TV, that have
application-specific metadata, e.g. ad targeting keywords, game data, and the
like, which are to be handled by specific modules on the client side as they
arrive, basically "dispatching" each track to a separate blob of code that does
not know ahead of time whether it will be needed or not.

We can't use "label" because some formats already provide a human-readable
string even for metadata tracks (for debugging?).

Is there any particular reason there needs to be multiple metadata tracks for
this, instead of the media stream having a single metadata stream that uses a
convention of putting the "dispatch" type code in the first line of the cue, or
something along those lines? (That would also avoid the problem of having to
keep track of when these new tracks come along and enabling them.)

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Received on Thursday, 3 November 2011 21:38:36 UTC

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