I've reverse engineered quite a bit of action cameras based on Allwinner's poorly documented chipset.It runs firmware closely related to H3, in fact I can compile a kernel that boots with no video from this source: https://github.com/friendlyarm/h3_lichee (using crane-sdv config)After getting ext2 working I would like to compile v4l utils for this system. This way I can record video with MY parameters using the adb command line.So my question is how can I do this? I don't have the tiny android source code although it appears based on 4.2.2 sans java. The rootfs is only 20MB but it has the full v4l2 system. I tried cross compiling with linaro against the /system/lib folder of rootfs but I can't run v4l-ctl, it says file not found.more info on the fw is here:https://dashcamtalk.com/forum/threads/hacking-q3h-allwinner-v3-camdroid.20507/What do I try next?Compiled stuff wasn't running because I had to use the android ndk so it can use the correct linker.you can proceed to kick the question back out on your technicality boys, thanks for the non-help
Allwinner Camera Reversing: Compiling V4L
linux;kernel mode;patch reversing