Ok, got it sorted. Tried the things below - but beware, I am not really sure of what I am doing


sudo apt-get install gstreamer-tools
sudo apt-get install libgstreamer-plugins-base0.10-dev libgstreamer0.10-dev libglib2.0-dev
sudo apt-get install libgtk2.0-dev

The message still shows up but now it seems to be working properly

By the way - processing seems awesome! I used the old videoscript (which was very simple to use) many many years ago and now wanted to find something similar. I had to look for a long time before finding something that a non-coder or at least high-level coder can use - thanks!