[Bug 24997] Add "Return values for Text.kind" table

https://www.w3.org/Bugs/Public/show_bug.cgi?id=24997

--- Comment #6 from Bob Lund <b.lund@cablelabs.com> ---
(In reply to Silvia Pfeiffer from comment #5)
> I have prepared a patch for this in a branch at
> https://github.com/w3c/html/commit/f91c1932220ab4272d2b2b4e6c9f3679251fefa1 .
> 
> Could you please check that this is all correct, in particular for MPEG-2,
> MPEG-4 and DASH (I checked Ogg and WebM and am quite confident on those).

For MPEG-4 metadata text track, you've used a list of sample entry codes
instead of 'meta' handler type. Beyond, 'mett' and 'metx', I do not know if
this list is accurate or not.

The table for setting text track kind, label and language looks good. 

> 
> Further:
> 
> * In bug 25044 you're requesting some similar specifications for setting the
> id, label and language on AudioTrack and VideoTrack. Is that identical to
> the TextTrack settings for these attributes?

Yes, the rules for setting id, label and language should apply to audio and
video as well as text tracks.

> 
> * Please particularly check the @kind settings for MPEG-2, MPEG-4 and DASH.
> MPEG-2 and MPEG-4 sound particularly restrictive, e.g. there is no fallback
> to @kind=metadata.

For MPEG-2 TS there are many many non-audio/video stream types beyond those
explicitly identified as metadata (0x05, 0x80 - 0xff), with no identified use
case for exposing them to script.

For MPEG-4, it seems that all metadata tracks would be identified by a handler
type of 'meta'. Is there a use case where that is not so?

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Received on Monday, 17 March 2014 16:10:58 UTC