
Hardware is an Arduino Mega2560 + NodeMCU WiFi Shield + Tinkerkit DMX shield connected to four LED PAR cans (QTX PAR56).
Software uses DXGI to sample screen at the full resolution and present rate, while using only ~5% CPU on a 4790K, even at 4K resolution capture.
This project was completed and showcased at NOVA 2017:
Demo shown is Ziphead by CNCD & Fairlight: