How to switch front/back camera on ODROID

ODROID-C2 lollipop support USB Webcam like front camera.

The camera preview is mirrored.

You can switch it back camera.

$ su
# mount -o rw,remount /system
# vi /system/build.prop

add this
rw.camera.usb.faceback=true

save and reboot system.
The camera preview is not mirrored.