when installing the camera2 api zip with the official twrp 3.2.1-0-oxygen recovery, the zip will not install with the following error message: "zip signature verification failed! error installing zip file ....."
edits: the obvious fix was to untick "zip file verification" in twrp. flash successfully thereafter.
I just found out that video stabilization (when recording video) in Google Camera actually works great if EIS video stabilization is turned on, so I've updated my Camera2 API Enabler flashable zip file to include EIS video stabilization, the file is HZQ_MIUI_Camera_Mod_CAMERA2_API_EIS_180829.zip (there is also an uninstaller as usual), link : https://www.androidfilehost.com/?w=files&flid=243501