Failed to create V4L2 device

[flexxxxer]

Error when normally running: PANIC Failed to create V4L2 device with id 50 Log here:

[flexxxer@laptop ~]$ sudo mon2cam -v=log DEBUG Starting Mon2Cam with the following options: Options { framerate: 60, device: 50, resolution: "", ffmpeg: [], border: false, sound: false, wayland: false, loggerOptions: { verbose: true, file: "log" }, execOptions: { verbose: true, output: 3 } } DEBUG Checking if V4L2 device exists DEBUG V4L2 device not found with id 50, creating it

Exec Context: a8a10940-6dd0-4fa6-902c-d131df93ddd8 Exec Options: { verbose: true, output: 3 } Exec Command: sudo modprobe -r v4l2loopback Exec Command Splits: [sudo,modprobe,-r,v4l2loopback] Exec Result: { code: 1, success: false }, output: "modprobe: FATAL: Module v4l2loopback not found." Exec Context: a8a10940-6dd0-4fa6-902c-d131df93ddd8

Exec Context: d74b5386-42c7-4ff8-96ba-7f9f84a49936 Exec Options: { verbose: true, output: 3 } Exec Command: sudo modprobe v4l2loopback video_nr=50 card_label="Mon2Cam" Exec Command Splits: [sudo,modprobe,v4l2loopback,video_nr=50,card_label="Mon2Cam"] Exec Result: { code: 1, success: false }, output: "modprobe: FATAL: Module v4l2loopback not found in directory /lib/modules/5.11.1-1-MANJARO" Exec Context: d74b5386-42c7-4ff8-96ba-7f9f84a49936

DEBUG Exiting DEBUG V4L2 device created with id 50 PANIC Failed to create V4L2 device with id 50

Linux headers was installed, kernel version 5.11.1. Distro is Manjaro

[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).

[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.