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[Bug 18960] Define how AudioTrack.id & VideoTrack.id are generated

From: <bugzilla@jessica.w3.org>
Date: Tue, 04 Dec 2012 17:46:04 +0000
To: public-html-bugzilla@w3.org
Message-ID: <bug-18960-2486-T6Y3TWTeyC@http.www.w3.org/Bugs/Public/>
https://www.w3.org/Bugs/Public/show_bug.cgi?id=18960

--- Comment #2 from Aaron Colwell <acolwell@chromium.org> ---
Based on the discussion at TPAC
(http://www.w3.org/2012/11/01-html-wg-minutes.html) I believe the consensus was
that the UA should generate unique IDs for the AudioTrack.id & VideoTrack.id
properties. These IDs don't change during playback even if the underlying track
IDs in the bytestream change.

It was suggested that a containerid property could be added to the AudioTrack &
VideoTrack objects to provide a way to expose the track IDs in the bytestream.
These are allowed to change during playback based on what track ID in the
bytestream currently maps to the specific track object. 

Based on the discussion on the media call today
(http://www.w3.org/2012/12/04-html-media-minutes.html#item06), I'm planning on
adding text to the spec about generating unique ID's for the tracks. We agreed
to defer adding the containerid property until we are sure that we actually
need it.

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