How to root rights in Android TV box ???

Question

Android

Comrades, tell me please, I’m wandering in three pines, I can’t understand)))
The point is. I want to install key mapper on Android TV box to play with keyboard and mouse. But for work, as I understand it, you can’t do without ROOT rights (because we essentially exploit the touch screen). after sorting through a bunch of applications, I realized that by installing the apk file, I definitely can’t get the root right. I had an idea: we take the img file of the system, open it with an extractor and add root rights, pack it back and flash the device. The question is what needs to be added there and where to set the root rights to the firmware. Rummaged through the Internet, everyone is talking about some kind of SU in the xbin folder. What kind of file and where to get it, please tell me who is in the know?

Answer 1

We pull out boot.img from the firmware
Install magisk manager APK
Run and find patch boot.img
Select our boot
We flash the patched boot as usual, sew your device. Download the prefix and open the
magisk manager again