Add new "mask" option to the mosaic_bridge module. This makes it possible to define a transparency mask used during mosaic blending. Example usage follows:
new background broadcast enabled
setup background input fake:
#setup background output #bridge-in:display
control background play
control channel0 play
The files used are available on http://people.videolan.org/~dionoea/mosaic/ if you want to test. (This will blend the redefined nintendo video in a cone like region)