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[Bug 12544] MEDIA CONTROLLER requires track kind for in-band tracks

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Date: Mon, 25 Apr 2011 18:56:43 +0000
To: public-html-bugzilla@w3.org
Message-Id: <E1QEQxf-00077H-J4@jessica.w3.org>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=12544

David Singer <singer@apple.com> changed:

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--- Comment #3 from David Singer <singer@apple.com> 2011-04-25 18:56:42 UTC ---
In response to Philip, I think that adding the API making it possible to (a)
iterate over the tracks in a multiplex source and (b) ask if they have a 'kind'
(I still prefer 'role', but whatever), does NOT imply that they will always
answer the question.  So it's OK to use old AVI files, for example.

The 3G liaison explicitly mentioned 'main', but I would have thought that this
is the default -- if a track is not explicitly labelled as performing some
other role, from the HTML5 point of view, treat it as part of the main program
(you really have no other choice).

It would be trivial for me to register a user-data item for use in ISO BMFF
family and QuickTime files (MP3, MOV, 3GP, 3G2, etc.), to carry a w3c 'kind',
or perhaps to carry a URN, which could be from the W3C or other namespaces.

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Received on Monday, 25 April 2011 18:56:45 UTC

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