black stripe screen

Why is the screen often black and flashing when filming?
maybe everyone once realized that when pointing the camera to the tv screen, computer or phone to film, it will see a lot of black stripes on the screen, if you continue filming your video will be bad and almost can't watch.
How to fix black screen or black stripe in Nox App Player
when using the above apps or playing games on nox app player, you may experience black or black screen problems. so what is the cause and how to fix it?