[gstreamer-bugs] [Bug 166785] New: New plugin: scroller

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 http://bugzilla.gnome.org/show_bug.cgi?id=166785
 GStreamer | gst-plugins | Ver: HEAD CVS

           Summary: New plugin: scroller
           Product: GStreamer
           Version: HEAD CVS
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: algernon at bonehunter.rulez.org
         QAContact: gstreamer-bugs at lists.sourceforge.net
                CC: all-bugs at bugzilla.gnome.org


When we can mix arbitrary video buffers onto another, and the mixer element is
pretty flexible, as a simple demonstration, one can do a scroller element. Onto
its sinkpad, one connects the foreground, onto the srcpad, the mixer, and the
scroller element fiddles the xpos and ypos properties of the mixer element.

That is what this plugin does.

It is implemented as a base class, on top of which I built two simple scrollers
(bouncingscroller, which makes the buffer scroll from one position to another
and then back; and loopingscroller which scrolls from one position to another,
then jumps to the starting position and starts again).

Ideas on how to make it better are welcome (I couldn't find a way to remove the
requirement that scroller's srcpad must be linked to a mixer element... it would
be nice if one could insert another element inbetween...).

The plugin was developed for the imagemixer element I submitted in bug #166783.

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