ddcctl: DDC monitor controls for the OSX command line

Adjust your external monitors' built-in controls from the OSX shell:

• brightness
• contrast

And possibly (if your monitor firmware is well implemented):

• input source
• built-in speaker volume
• on/off/standby
• rgb colors
• color presets
• reset

Install

make install

For an On-Screen Display using OSDisplay.app:
make CCFLAGS=-DOSD clean ddcctl

Usage

Run ddcctl -h for some options.
ddcctl.sh is a script I use to control two PC monitors plugged into my Mac Mini.
You can point Alfred, ControlPlane, or Karabiner at it to quickly switch presets.