OK!
catweasels’ patch seems to be doing just fine. I adjusted a few things (like playback speed set to 0, so that after I jump to a position the video stays still), and some minor details (like connecting via OSC to PD), so far so good with 640x480 videos, I’m happy!!!
Now, i’d like the video to leave some “ghost images” or “echoes” when it jumps from a position to another one. I’m quite used at doing similar stuff using alpha trail (i think that’s the name) in resolume, I guess I could do that in vvvv using freeframe effects, right?
frank thanks for the patch, i’ll check it later, but it seems i’m ok for now, and I’m quite in a hurry to make this project. Thanks anyway for your help!