[Bug 20853] New: [WebVTT] WebVTT files should have a default language

https://www.w3.org/Bugs/Public/show_bug.cgi?id=20853

            Bug ID: 20853
           Summary: [WebVTT] WebVTT files should have a default language
    Classification: Unclassified
           Product: TextTracks CG
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: WebVTT
          Assignee: ian@hixie.ch
          Reporter: silviapfeiffer1@gmail.com
        QA Contact: dave.null@w3.org
                CC: mike@w3.org, public-texttracks@w3.org
        Depends on: 15922

As discussed in bug 15922 , the :lang() selector used on a WebVTT file's cues
that have no <lang> markup can't match anything.

This leads back to the need to specify file-level language.

One way to fix this is to take the implicit assumption that if the WebVTT file
was pulled in via a <track ... @srclang attribute, that @srclang is the default
language of the WebVTT file and can be used in :lang() selections, e.g. when
all text on a video in a particular language requires specific styling.
Providing <lang> markers for every single cue just to set the default language
seems overkill.

This further leads on to specifying the language of the WebVTT file in the file
itself for those applications that don't display the WebVTT file in a browser
e.g. as in

   WEBVTT
   Language=fr

   cue id
   00:00:00.000 --> 00:00:01.000
   bonjour

IMO this file-wide metadata field can be ignored by the Web browser, since the
Web browser relies on @srclang in <track>. So, this is just a hint for other
WebVTT consuming clients.

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Received on Saturday, 2 February 2013 07:08:42 UTC