I have a RaspberryPI4 (4G ram), that I use to test picrate a ruby implementation of processing (using JRuby). I haven’t tried running the processing ide (using instead geany as my ide). If you haven’t already done so I recommend you install latest updates:-
- sudo apt-get update
- sudo apt-get dist-upgrade
I also suggest using FakeKMS option, for video I use the latest processing video library see also USB Camera Capture on RaspberryPI. For my application I use Debian Buster open-jdk8 (the processing download includes a modified oracle jdk8). You should bear in mind processing was designed with RasberryPI3 in mind.