Hide shell from background

[sielf]

Hello.
I'm working with gstreamer pipeline which show video in the main screen of
device. (e.g. simple imxv4l2 -> imxg2dvideosink)
The problem is : When I show the video, on the background I can see cursor
from the main shell and sometimes screen flashes probably because there is
no activity in the shell. 
How can I disable shell from the screen backside?



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