[Bug 12141] <video> Specifically state that all <track> options be exposed to the end user

http://www.w3.org/Bugs/Public/show_bug.cgi?id=12141

Ian 'Hixie' Hickson <ian@hixie.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|                            |FIXED

--- Comment #15 from Ian 'Hixie' Hickson <ian@hixie.ch> 2011-08-11 20:40:33 UTC ---
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Status: Partially Accepted
Change Description: see diff given below
Rationale:

(In reply to comment #12)
> We refer to this statement:
> "there must not be two track element children of the same media element whose
> kind attributes are in the same state, whose srclang attributes are both
> missing or have values that represent the same language, and whose label
> attributes are again both missing or both have the same value."

This statement says _nothing_ about consumers, user interface, or anything
relating to how the browser is supposed to act.

I've added some text to the specification that reemphasises this point
generally, as it seems to be a point of common confusion. I haven't added any
text specifically about text tracks because there is nothing special about text
tracks here as opposed to any other feature.

The spec doesn't define user interface. A browser could be completely
conforming if it never exposed any of the tracks to the user and just
automatically picked one. Or two. Or displayed all of them simultaneously, or
none ever, or had a menu permanently on the screen that allowed the user to
enable or disable them, or handled duplicates by always enabling or disabling
them together, or called them "duplicate one" and "duplicate two" in the user
interface, or downloaded the files and examined them carefully and then used AI
or the Amazon Mechanical Turk to create clear distinguishing titles or printed
the complete text of both text tracks and then required the user to highlight
which cues the user wanted from each text track and then had the user scan the
tracks back in and then enabled and disabled the tracks according to the user's
indicated preference.

If there are specific requirements on user interfaces that you think are
important for user agents to implement to be accessible to a broad audience,
then that is the kind of thing to put in a UAAG document or to address directly
to the user agent vendors.

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Received on Thursday, 11 August 2011 20:40:40 UTC