Fixed the motion track example

examples/motion-track.js

@@ -1,15 +1,16 @@
-var cv = require('../lib/opencv')
+var path = require('path'),
+    cv = require('../lib/opencv');
 
-
-var vid = new cv.VideoCapture("/Users/peterbraden/Desktop/repos/node-opencv/examples/motion.avi")
+// When opening a file, the full path must be passed to opencv
+var vid = new cv.VideoCapture(path.join(__dirname, "motion.mov"));
 
 vid.read(function(err, mat){
   var track = new cv.TrackedObject(mat, [420, 110, 490, 170], {channel: "value"});
   var x = 0;
   var iter = function(){
-    vid.read(function(m2){
+    vid.read(function(err, m2){
       x++;
-      var rec = track.track(err, m2)
+      var rec = track.track(m2)
       console.log(">>", x, ":" , rec)
       if (x % 10 == 0){
         m2.rectangle([rec[0], rec[1]], [rec[2], rec[3]])