I have a Logitech C270 plugged into my pi 3b+. Was working fine, then I installed Octolapse. Adjusted the config file until I got it working, made some nice lapses, and was pretty happy with it.
And then I wasn't. The picture turned into snow. So I rebooted the pi, and it became colored snow with a basic shape. Rebooted, almost a good picture. Rebooted, snow. Rebooted - wait, now it's working again!
So this happens on and off every few days. As I write this I'm on reboot #10 to try and get it back working.
config from octopi.txt:
camera_usb_options="-r 1280x720 30"
Creality Ender 3