Recently developer Scrubber (4pda) released most stable version of GCam till date. But unfortunately it requires Android 7.1+ to work with.
Which means it can't be used with any of MIUI ROM.
So here I come, I modified the APK uploaded by Scrubber to minimum api level 24(earlier 25)
Now Everything is working perfectly without any fc (except slow motion)
HDR+ & Portrait Mode working on both front and rear camera.
Note: 1. Camera2 API must be enabled. (Pls do some research)
This may help
2. [Very important] If you're coming from a different GCam, you must clear app data, otherwise you may get nothing but a black screen.
Hey guys good news is here, Scrubber has updated Gcam. This time he released it separately with api level 24 support. So no need for any modifications this time by me.
Changelog: Added option for HDR+ parameters.
Tested on MIUI 9.
Download Link in second Post....
Credit: Scrubber, me, and Google too