While running the "scratch" example that comes with Processing 2.0a, I found and fixed a tiny bug.
adding the following after import.processing.video.*;
eliminates the error messages.
int vscale =0;
int inputselector0=0;
int vconv=0;
int vqueue=0;
int vbin=0;
int streamsynchronizer0=0;
int playsink0=0;