[Bug 21667] Add support for forced subtitles

https://www.w3.org/Bugs/Public/show_bug.cgi?id=21667

--- Comment #4 from Eric Carlson <eric.carlson@apple.com> ---
(In reply to comment #3)
> I wasn't aware there were so many different categories of subtitles:
> http://en.wikipedia.org/wiki/Subtitle_%28captioning%29#Categories
> 
> However, it seems that the general distinction is between "forced" and
> "narrative" subtitles. I think it is appropriate to define a @kind="forced"
> or @kind="forcedSubtitles". It seems to me that the other categories are
> covered by these two. It also seems to me that it's possible to have several
> forced subtitle tracks in the same language required to be on (see the
> "forced" and the "titles only" examples in the above link). So this is
> different from normal subtitle tracks.
> 
> How is the browser expected to identify the language for which it has to
> display forced subtitles? Would that be the language setting of the browser?
> Would we continue to have @default on such tracks in case the browser
> doesn't know which language track to choose?
> 
 I believe it should be the language of the video's primary audio track,
because forced subtitles are enabled in a situation where the user can
presumably understand the dialog being spoken in that language (they have not
indicated a preference for captions or subtitles).

> [Aside: I noticed there are 3D positioned subtitles - might this be
> something that we need to consider introducing into WebVTT?]
>
  Lets wait and see how popular that is. Forced subtitles are already widely
used, so I think we need to deal with them now.

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Received on Thursday, 11 April 2013 23:45:07 UTC