opencv problem with bootcamp

I'm trying to do face detection on a video with opencv on bootcamp (windows 10) and processing 2.2.1

import processing.video.*;

Movie video; import gab.opencv.*; import java.awt.Rectangle;

OpenCV opencv; Rectangle[] faces;

void setup() { size(640,360);

video = new Movie(this, "people.mp4"); video.play(); video.loop();
opencv = new OpenCV(this, video.width, video.height); opencv.loadCascade(OpenCV.CASCADE_FRONTALFACE); }

void draw() { background(0); fill(255);
image(video,0,0);
opencv.loadImage(video); faces = opencv.detect();
}

void movieEvent(Movie m) { m.read();
}

It crashes at the line: opencv.loadImage(video);

With the message: IndexOutOfBoundsException: Index 3: Size 0

Any ideas? This works fine on mac osx with the same version of processing.