[Bug 698853] New: HTML5 kind attribute (subtitles, captions, metadata, descriptions, chapters)

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=698853
  GStreamer | gstreamer (core) | git

           Summary: HTML5 kind attribute (subtitles, captions, metadata,
                    descriptions, chapters)
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: self at brendanlong.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


In HTML5, we need to mark text streams as subtitles, captions, metadata,
descriptions or chapters, but there doesn't seem to be a way to do this in
GStreamer. For audio and video tracks, there are also kinds: alternative,
captions (legacy), description, main, main-desc, sign, subtitles (legacy),
translation, and commentary.

For metadata, the caps will probably be different, but for everything else the
caps would be the same.

The simplest solution seems to be to add a GST_TAG_KIND, which can contain any
of the kinds defined in HTML5.

See:

http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#text-track-kind
http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#dom-audiotrack-kind

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