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

http://www.w3.org/Bugs/Public/show_bug.cgi?id=13359

Glenn Adams <glenn@skynav.com> changed:

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

--- Comment #3 from Glenn Adams <glenn@skynav.com> 2011-08-19 17:24:29 UTC ---
(In reply to comment #2)
> EDITOR'S RESPONSE: This is an Editor's Response to your comment. If you are
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> Status: Did Not Understand Request
> Change Description: no spec change
> Rationale: I don't understand. What is the concrete use case where a script
> would be doing anything with a kind=metadata track and not know what the
> metadata is but yet would still be able to do something useful with it?

My understanding (Bob may wish to correct) is as follows:

Page origin O exposes video/audio from a 3rd party P, which contains/refers to
a metadata track sourced by P or sourced by a 4th party M.

Page origin O provides JS for interpreting metadata tracks with media types M1,
M2, or M3.

If Page author O is provided with content type information for the metadata
track contained in response headers (or by other means if fetched via
non-HTTP), then O's JS can select appropriate handling of metadata content
exposed to JS via TextTrackCue.getCueAsSource().

This information could be exposed to JS via a new TextTrack.type IDL attribute.

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Received on Friday, 19 August 2011 17:24:32 UTC