[Bug 748457] New: Make the shade of shaded backround configurable

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=748457

            Bug ID: 748457
           Summary: Make the shade of shaded backround configurable
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-good
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: tomashnyk at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

The property documented here (could not find as detailed docs for 1.0):
http://www.freedesktop.org/software/gstreamer-sdk/data/docs/latest/gst-plugins-base-plugins-0.10/gst-plugins-base-plugins-textoverlay.html#GstTextOverlay--shaded-background
is a boolean. It would be nice if it accepted a parameter (say an integer from
0 - no background to 100 - full black) that would set shade of the background.
Main use case would be setting it to 100 to make the background completely
black as it makes the subtitles best readable. (this was actually first
requested here for the needs of an application aimed at subtitle creating where
one is very much interested in the good readability of the subtitles
https://gna.org/bugs/?23502)

I think this could be backwards compatible, right?

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