I got the exact same errors when I tried to compile v4l2loopback kernel module for 4.4.179 modprobe: ERROR: could not insert module test.c: Invalid module format uname -r reported: 4.4.179 modinfo 4.4.179 It took me two days to get it fixed: As I understand it you will need not only the matching ker...

Today I did some testing on my NanoPi M4 and two of the FriendlyElek CAM1320 (OV13850) modules on FriendlyDesktop and Android 8.1. While there is no AutoFocus out of the box on Linux there is one on Android. Using the Android Camera App the CAM1320 module changes focus. It's focusing speed on Androi...