Prerequisites

Required packages (OpenSUSE):

Build prerequisites:

• opencv-devel
• v4l2loopback-dkms
• v4l2loopback-utils
• gcc-g++

Optional viewers:

• cheese
• vlc
• mpv

Building the tool

$ make

Check existing video devices

$ v4l2-ctl --list-devices

Create virtual camera loopback device

$ make setup-loopback

Resources

• https://docs.opencv.org/4.x/d1/dc5/tutorial_background_subtraction.html
• https://arcoresearchgroup.wordpress.com/2020/06/02/virtual-camera-for-opencv-using-v4l2loopback/