Disable webcam audio and preserve video

90-blacklist-webcam-sound.rules

# Disables webcam audio.
SUBSYSTEM=="usb", DRIVER=="snd-usb-audio", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="0991", ATTR{authorized}="0"

README.md

Instructions from this helpful guide.

1. Run lsusb to identify USB webcam:

   $ lsusb
   Bus 004 Device 002: ID 0424:5734 Microchip Technology, Inc. (formerly SMSC) USB5734
   Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 003 Device 010: ID 0c45:6366 Microdia USB Camera
   Bus 003 Device 003: ID 0424:274c Microchip Technology, Inc. (formerly SMSC) 
   Bus 003 Device 002: ID 0424:2734 Microchip Technology, Inc. (formerly SMSC) USB2734
   Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver
   Bus 001 Device 002: ID 04b4:0510 Cypress Semiconductor Corp. HID Keyboard
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   

2. Create a new file /etc/udev/rules.d/90-blacklist-webcam-sound.rules:

   sudo nano /etc/udev/rules.d/90-blacklist-webcam-sound.rules
   

3. Add the lines from the attached text file, replacing your webcam's vendor and product ID.

4. Reload your rules file. Might need to unplug your device.

   sudo udevadm control --reload-rules