Face vs MotionDetect in oZone

nvrcam.face = new FaceDetector( "face-"+name ); // init face detection
nvrcam.rate = new RateLimiter( "rate-"+name,face_refresh_rate,true ); // no need to perform detection on every frame!
nvrcam.rate->registerProvider(*(nvrcam.cam) ); // rate reads frames from camera
nvrcam.face->registerProvider(*(nvrcam.rate) ); //  face reads frames from rate!
nvrcam.motion = new MotionDetector( "modect-"+name );
nvrcam.motion->registerProvider(*(nvrcam.cam) ); // motion detect reads frames from camera

// now do the magic!
nvrcam.cam->start();
nrvcam.rate->start();
nvrcam.face->start();
nvrcam.motion->start();