ADB screencap while playing video

Question

adb exec-out screencap -p > screen.png

This used to work on my Chromecast with Google TV while playing video (no DRM) when it was running on Android 10. After upgrading to Android 12, it just produces a completely white image (with correct screen resolution; with no other view widgets either). This is the case when playing videos using MX Player, YouTube and other apps using ExoPlayer.

Can I get screencap to work as it did or another way to take screenshots?

Answer 1

Can't be done. Blocked on an OS level.