If it fails only within VDO.Ninja, make sure you've enabled the Camera and Microphone permissions for VDO.Ninja.
Make sure VDO.Ninja has access to the camera and microphone
Close other apps or restart the computer
Sometimes another app is using the camera, and closing all other apps or restarting the operating system can fix it up. You cannot use your camera in OBS and in Chrome at the same time, for example.
Force close the camera app
You can try running the following from your Terminal in MacOS:
You can also close the camera app in MacOS via
Turn off hardware acceleration
In Chrome, you can turn off "Use hardware acceleration when available" in the chrome://settings/system page. You'll want to restart the browser after
Make sure Chrome has access to your microphone and camera
Go to your Security & Privacy page in your MacOS settings, select the privacy tab, and make sure Google Chrome has access to your camera and microphone.
Reinstall Chrome
Do a full and complete uninstall of Chrome and then re-install. Perhaps try using the Chrome Beta version. Also make sure not to have any browser extensions install, as they can conflict.
Try a different camera
Maybe your camera is not working or compatible, for whatever reason. Try a different camera and see if it works.
Update or reinstall your macOS
As a last resort, reinstalling the system fresh might be an option.
