Using digicam as a webcam on Linux
A short memo on how to use a digital camera as a web camera on Linux.
I recently dug out a pretty old Canon EOS 550D, and since I only have a poor built-in webcam, that was a chance to improve my video quality significantly!
Once plugged into a USB port, the camera is detected just as storage. We need two things to make it work properly:
- Stream the video feed from it
- Pipe this feed into a virtual video input device
The first step is pretty simple — just use
The second piece of the puzzle is
v4l, in particular,
v4l2loopback. If you’re using Arch like me, you can just install it:
This will also install the required DKMS package to bring in the kernel module named
To create a virtual video device. You can check the kernel logs for the exact path in my case, it was
Now we can stream the video feed from the camera to that device using
And we’re done!