➜ uname -r
# get installed kernel version

➜ pacman -S linux-headers
# select kernel version

# install v4l2 loopback driver with DKMS infrastructure
➜ pacman -S v4l2loopback-dkms

➜ sudo modprobe videodev

➜ sudo modprobe v4l2loopback devices=1 video_nr=2 exclusive_caps=1 card_label="ExternalWebCam"

➜ v4l2-ctl --list-devices
Dummy video device (0x0000) (platform:v4l2loopback-000):
	/dev/video2
# use /dev/videoX listed as platform:v4l2loopback later in gphoto command

➜ pacman -S gphoto2

➜ gphoto2 --auto-detect
# displays connected camera

➜ gphoto2 --stdout --capture-movie | ffmpeg -i - -vcodec rawvideo -pix_fmt yuv420p -threads 0 -f v4l2 /dev/video2
# /dev/video2 will contain the video feed from EOS camera