Octoprint Logitech C920 webcam - martikainen87/Home-Automation GitHub Wiki

Original guide

To set the image quality and focus, do the following

SSH into your octoprint server

sudo apt-get install uvcdynctrl

Try different settings with these commands

uvcdynctrl -s 'Brightness' 150 
uvcdynctrl -s 'Contrast' 35 
uvcdynctrl -s 'Saturation' 50 
uvcdynctrl -s 'Sharpness' 
uvcdynctrl -d video0 --set='Focus, Auto' 0
uvcdynctrl -d video0 --set='Focus (absolute)' 10

Change the "Foucs (absolut)' XX value to set different focus

Create a directory for a script

mkdir -p /home/pi/bin

Create a new file for the script

nano /home/pi/bin/cam_init.sh

Paste the command with your settings

uvcdynctrl -d video0 --set='Brightness' 150
uvcdynctrl -d video0 --set='Contrast' 150
uvcdynctrl -d video0 --set='Saturation' 150
uvcdynctrl -d video0 --set='Sharpness' 175
uvcdynctrl -d video0 --set='Focus, Auto' 0
uvcdynctrl -d video0 --set='White Balance Temperature, Auto' 1
uvcdynctrl -d video0 --set='Focus (absolute)' 50

Set correct permissions to make it executable

chmod a+x /home/pi/bin/cam_init.sh

Enable autorun for the script

nano /home/pi/.octoprint/config.yaml

Add this at the bottom

events:
  subscriptions:
  - event: ClientOpened
    command: /home/pi/bin/cam_init.sh
    type: system

Restart the pi, and when you connect to octoprint the script will run and your settings will be set.