gstreamer/tests/examples/gl/generic

--- Description of the generic (no GUI) examples ---

- cube:
Show how to have a graphic FPS greater than the input video frame rate.
The source is the videotestsrc rgb.

- cubeyuv:
Show how to have a graphic FPS greater than the input video frame rate.
The source is a local video file needed in argument.
The colorspace conversion is maded by the glupload element.

- doublecube:
A local video source is displayed into two renderers.
The first one is a normal 2D screen, the second is a 3D cube.
We can visually check that the video is displayed at the same speed
in the two renderers.

- recordgraphic:
Show how to use the glfilterapp to define the draw callback in a gstreamer client code.
The scene is recorded into an avi file using mpeg4 encoder.
The colorspace conversion is made by the gldownload element.