Eli5 how does iPhone video recoded its own screen?! I’m baffled. Not much online about how it works either.

Question

I know how to record the screen. But how does it actually work??

In: 0

Answer 1

It records the screen the same way it displays stuff on the screen. There is software inside the phone that figures out what the screen should look like, and puts that binary pattern in the memory used by the screen hardware to light up the display. To record it, it just makes a copy into the video file of the binary pattern that’s going to the screen, it’s already done the hard part – computing what goes on the screen.