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

From: <bugzilla@jessica.w3.org>
Date: Thu, 09 Feb 2012 20:39:47 +0000
To: public-html-a11y@w3.org
Message-Id: <E1RvamR-0003EN-7z@jessica.w3.org>
https://www.w3.org/Bugs/Public/show_bug.cgi?id=12544

Bob Lund <b.lund@cablelabs.com> changed:

           What    |Removed                     |Added
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                 CC|                            |b.lund@cablelabs.com

--- Comment #25 from Bob Lund <b.lund@cablelabs.com> 2012-02-09 20:39:40 UTC ---

(In reply to comment #24)
> Mark: That would make the API maddeningly hard to use right.
> 
> EDITOR'S RESPONSE: This is an Editor's Response to your comment. If you are
> satisfied with this response, please change the state of this bug to CLOSED. If
> you have additional information and would like the editor to reconsider, please
> reopen this bug. If you would like to escalate the issue to the full HTML
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> 
> Status: Accepted
> Change Description: see diff given below
> Rationale:
> 
> I've tried to map the most useful DASH role combinations to the defined HTML
> values. Hopefully that's good enough for most purposes. If there are specific
> use cases that this doesn't handle, please file separate bugs (I don't mind if
> they are handled as LC1 bugs).
> 
> If there are other specifications that define specific roles that should be
> mapped here, please file separate bugs with links to the relevant specs (I
> don't mind if they are handled as LC1 bugs either).

I agree that an enumeration of track kinds is best but there is an issue of
spec timing that should be considered.

I raised the need for a new role value with the DASH spec authors to address
the same issue identified in bug 13357 (new kind for pre-mixed audio
descriptions) . The response was that future specs should create new schemes
that define needed Role values.

If Roles (or Role combinations) are _only_ explicitly enumerated in HTML for a
given set of referenced specs then it seems likely there will be  future cases
that aren't captured in a particular version of HTML. It would be very useful
if when the UA encountered a Role, or set of Role values, that were not mapped
in HTML, a string, such as was suggested in Comment 22, was created.

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Received on Thursday, 9 February 2012 20:39:48 GMT

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