Failed to create V4L2 device about mon2cam

[sargentogato]

Solved. I case someone get the same error

I installed this
sudo apt-get install -y v4l2loopback-dkms from here (instructions)

After that, I got another error asking me for the fffmepeg. I Installed it from here
sudo apt-get install ffmpeg

https://rdrr.io/cran/ndtv/man/install.ffmpeg.html#:~:text=FFmpeg%20is%20a%20standard%20package,the%20Software%20Center%20on%20Ubuntu.

[botiapa]

v4l2loopback module is not installed on your system. You probably need this package https://archlinux.org/packages/community/any/v4l2loopback-dkms/

[flexxxxer]

but actually installed

[botiapa]

Have you tried restarting linux after installing it?

[flexxxxer]

Have you tried restarting linux after installing it?

yes. and tried reinstalling software with rebooting

[ShayBox]

Did you install your kernel headers

[flexxxxer]

Did you install your kernel headers

yes.

[flexxxxer]

I was helped by removing v4l2loopback from the official manjaro repository and installing v4l2loopback with AUR. I think that on this the problem can be considered solved

[sargentogato]

i am using Ubuntu 20.04
I got the same error PANIC Failed to create V4L2 device with id 50

I checked my system and it seems the header is installed linux-headers-5.8.0-50-generic ya está en su versión más reciente (5.8.0-50.56~20.04.1).