Hello everyone. I expect that all of you are doing fine.

I am new to Manjaro and I have a few question about some programs. I tried to install Fakecam, but it says I need to install this driver v4l2loopback and I haven't found yet the instructions to do so on Manjaro.

I installed OBS Studio but I continue to get a GPU error when I try to load the program. I managed to access it using a command from the terminal, but, when I try to record a video it also says it is not possible (something related with the graphics cards too, don't remember quite well the message it sends).

I also installed a program called Cheese, but it doesn't record and runs very slowly, there was another program I installed from the Add/Remove software application that I don't even remember the name, it just didn't recognize the webcam I have plugged on the computer.

I've also installed Blender, but it just doesn't run. I click the icon on the menu-bar, the icon appears on the bar at the bottom of the screen like it is loading and then it just closes.

Some ideas about what can be happening?

Update:

I managed to find the command to install v4l2loopback. When I try to install it, It says that I don't have the kernel headers to do so:

==> Unable to install module v4l2loopback/0.12.5 for kernel 5.7.15-1-MANJARO: Missing kernel headers.
==> Unable to install module v4l2loopback/0.12.5 for kernel 5.4.58-1-MANJARO: Missing kernel headers.

I already ran the command to install the kernel header, but I don't have a clue about which kernel header fakecam uses.

:: There are 9 providers available for linux-headers:
:: Repository core
1) linux414-headers 2) linux419-headers 3) linux44-headers 4) linux49-headers 5) linux54-headers 6) linux57-headers 7) linux58-headers
:: Repository community
8) linux54-rt-headers 9) linux56-rt-headers

Use the headers that respond to your kernel.

There's too many topics in your OP.
I suggest you edit it to only one topic, and open new topics for the other question(s). Make sure to read the LQ rules, how to ask a question, what information to provide, what to do before posting a question.

Thank you very much for your answer. I will read then forum rules for asking questions and divide the different topics in different posts.