gstreamer/tests/examples/gl/gtk/README

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--- Description of the GTK examples ---
- gtkvideooverlay:
Show how to use the videooverlay interface through GTK.
It's possible to switch bettween GST_STATE through four buttons.
-filternovideooverlay:
A more complex pipeline is switched bettween the GST states
without using the videooverlay interface.
-filtervideooverlay:
A more complex pipeline is switched bettween the GST states.
using the videooverlay interface.
-fxtest:
switch bettween effects of the gleffects filter.
-pixbufdrop:
drag and drop a png file and overlay it using alpha channel.
It uses gloverlay filter.
-switchvideooverlay:
change the videooverlay window while the stream is playing.
--- How to build the GTK examples ---
Using autotools or using tests/examples/gtk/gtk.sln