So my first approch faild gloriously, I need some hints. What I have is a selfbuilt WS2812 matrix 32x64 Pixel. I also habe a mp4 video (in the same resolution), which should be displayed on the matrix. First try was (actually by my son, he does the programming, I do teh hardware): Converting each frame into the according RGB matrix (at 25fps) with a python programm and direct the output into a textfile ( I know that this is not the most resource saving way, but quick to do). I think the teensy 3.2 we use for driving the Display should have enought memory to handle that. Sadly I can't figure that out, because the arduino IDE crashes while c&p the file.
Our next approach would be to use a Pi (or any other PC) to deliver the frames "on the fly" via UART to the teensy and let it only do the matrix driving.
But I really would like to get it running on the teensy stand alone. Any other ideas to handle that one? Prefereable something that is doable in a few days without investing some 100 Euros?