Hello everybody. I want to share my experience on Mi Mix 2 with Gcam.
First of all i suggest to instal the latest global stable rom as it looks has better ram managment and battery life. unlock bootloader flash official twrp and instal magisk.
In magisk you will find a module called Pixel experience it adds the nececery files in build.prop to make the gcam run with no problems. You can choose if you want pixel launcher too.
After installing the module reboot. Sometimes after reboot wifi doesnt work so reboot again maybe wipe cache/dalvik helps.
Instal this version of gcam
Gcam <---press
Rember any time you make a chenge in settings of Gcam you must terminate tge app to take effect.
Screenshots from my gcam settings( some are in Greek language)
Notice higher hdr+ parameters means more time to take the image so if it is a dark place to take photo will take more time to take the photo. (Sry for my english)
Edit: Dont enable 4k in front picture it doesnt work.
Also dont enable the night mode that removes the reddish bla bla bla... it doesnt work.
60fps doesnt work.You can record a video but 1st is dark and 2nd is still in 30fps.
If you want the moving picture you must enable the motion option but it doesnt work the HDR+ you will notice that. To see the motion picture(moving) you need the google photos app to see it moving. Doesnt work with stock album.
Any mode that doesnt totally works with Gcam you can do it with stock cam example the slow motion.
Any question ask me...