Hi everyone!

I'm building a patch that is supposed to "convert" a live video stream into a sound. Actually the video comes from my webcam. I want to sample the video into frames (for example 10 fps), and "print" them into the spectrogram, like COAGULA or the Beepmap in Fl studio. In the spectrogram, we can "read" the video, just like a comic, a bit like the work of Norman McLaren.

What I have in the output of my webcam is a gemlist. What can I do with it? How to convert it into a sound?

I'm fairly new at Pure data, but I have to finish the patch for the next week!
I'm waiting for your help,