I have a logitech c920 even just purchased vrc+ to see if that would fix the issue. unfortunately it hasn't. Nothing I've tried seems to work and as far as I can de-deuce its something to do with the camera not supporting a 4:3 resolution anymore. Not sure what to do as its not a particularly old webcam and newer cameras don,t seem to support that resolution either. Only difference is I don't get the Anti cheat pop up when I close the game.

I'm having this problem too, I've tried turning off a bunch of programs, changing quality, etc but nothing works. Only reason I'm paying for VRC+ and it doesn't work. I have a Logi C900 series camera and I can play AAA games on my PC with no issues.

Yes the problem is still relevant. I just try to enable it and I get the warning “webcam was incompatible or used by another program”.

In other applications, my webcam works fine.

I could try to provide some technical information or logs if you could tell me what information you need and where I can get it.

Okay so I aint completely sure how I fixed this but one of these 2 ways should be a solution, or maybe both:

Solution 1: change to the stable version (not the beta) of vrc, update and then go back to open-beta version

Solution 2: enable face tracking and change the quality tracking (doesnt matter which one just change it)

I get the same problem, including the EAC untrusted system file, idk how to fix it, even restarting my pc and disabling apps using webcam and such, nothing works

a quick google research later : https://trac.ffmpeg.org/ticket/10397