@ITman496 Vanilla Processing is wedded to the idea of using a built in jdk, so unless you do bit a of work you are stuck with it (previously it was quite easy to substitute the jdk see http://cagewebdev.com/raspberry-pi-running-processing-on-your-raspi/) but that may not work now. The official processing release for the PI was very much tailored to RaspberryPI3B+ and Stretch OS.
Ah, understood. I’m not sure how you achieved it, and so I suppose I will be like many, and waiting for an official pi 4 release. Hopefully it doesn’t take too long!
Same problem when fullscreen! My code is a very simple video playback when triggered by an IR sensor. I wasn’t even using HD videos to test. Ridiculously slow and low fps even on my friend’s Pi 400, not to mention the 1GB Pi 3 that I initially tested on. I’m using Processing 3.