processing a video in haar.js in Node

gistfile1.js

var cv = require('opencv');
var Canvas = require('canvas'),
fs = require('fs'),
HAAR = require('./src/haar-detector');

var loaded=false;
var detector = require('./cascades/haarcascade_frontalface_alt').haarcascade_frontalface_alt;
var vid = new cv.VideoCapture(__dirname +"/../../120308.mp4")

var Image = Canvas.Image;
var looping =function(){
  vid.read(function(mat){
    var img = new Image;
    img.onload = function(){   
      new HAAR.Detector(detector).image(img, 1, new Canvas()).complete(function() {
        //processing done
        console.log("processing done", JSON.stringify(this.objects))
        looping();
      }).detect(1, 1.25, 0.1, 1, true);
    }
    img.src = mat.toBuffer();
  })
}
looping();