Error starting virtual camera

[michael135]

When running:

sudo modprobe v4l2loopback video_nr=20 card_name="Virtual Camera 1" exclusive_caps=1

I'm getting:
modprobe: ERROR: could not insert 'v4l2loopback': Operation not permitted

[prabhakar-sivanesan]

Hi Micheal,

Please give some additional information to debug the problem like,

1. OS type
2. Commands used
3. Also, information about previous version of v4l2loopback module installed, if any.

[michael135]

Hi Prabhakar,

1. Ubuntu 20.04
2. Commans as in Readme.
3. Regarding the v4l2loopback version:

apt -a list v4l2loopback-dkms
Listing... Done
v4l2loopback-dkms/focal-updates,focal-updates,focal-security,focal-security,now 0.12.3-1ubuntu0.4 all [installed]
v4l2loopback-dkms/focal,focal 0.12.3-1 all

[prabhakar-sivanesan]

I personally didn't face this issues, but it looks like building the v4l2loopback module from source will solve this issue as suggested here here.
Step 1: Remove existing v4l2 module using sudo apt-get remove v4l2loopback-dkms
Step 2: Clone v4l2loopback module and build from source make && sudo make install and then run sudo depmod -a
Step 3: Create virtual camera using sudo modprobe v4l2loopback video_nr=20 card_name="Virtual Camera 1"

Please try these steps and let me know the whether the issue is solved.

P.S: I have also updated the readme with code to create virtual camera. Please refer that or clone the latest repo.

Edit 1 (23/07/2022): I encountered the same issue on couple of my friends machine. The above mentioned steps solved in one machine and not for the other. So I had to disable the Secure Boot option in the BIOS settings and it solved the issue finally on the other machine.