How can I create a mosaic in Gstreamer? How can I set "sink_0::xpos=0 sink_0::ypos=0 sink_0::alpha=0" in Python?

[Arjen Veenhuizen]

You should use:
self.pad0 = self.videomixer.get_request_pad("sink_0") 
According to the documentation, the videomixer sink pads are only available
on request.
Then, you can set the properties on the pad the way you are already doing
it.

Btw, I would consider moving to the compositor element (which is basically
an improved version of the videomixer element)



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