How to swap the camera so Opera 12 uses front camera for getUserMedia()

Essentially you only need to swap the tags 'front' and 'back' in the file /etc/nvcamera.conf

The change is permanent across reboots, but messes the orientation/mirror image of the cameras, so the rear camera becomes a mirror image, not the front. This messes all portrait shots as the camera pic becomes upside down.

Device needs to be rooted.



Need to make /system directory read/write:

# mount -o rw,remount /system

# vi /etc/nvcamera.conf# format, cameraName=device,direction,orientation,type

This is the file before mods
# type can be 'stereo' for stereo capable, 'mono' for not stereo capable,
# 'usb' to enable searching for a usb device and where to put it in the list
# if found. Lines must be shorter then 256 characters
version=1
camera0=/dev/ov5640,back,0,mono
#camera1=/dev/ov5650,back,0,mono // 2nd camera for stereo once supported
camera1=/dev/mi1040,front,0,mono
#camera4=/dev/ov5650,back,0,stereo // virtual stereo device once supported


Change this line:
camera0=/dev/ov5640,back,0,mono

to:
camera0=/dev/ov5640,front,0,mono

And this line:
camera1=/dev/mi1040,front,0,mono

to:
camera1=/dev/mi1040,back,0,mono


Save and it works.

source : https://forum.xda-developers.com/showthread.php?t=1699299