Playing with OpenCV; making myself into a robot

robot.py

import cv2 

# See https://www.youtube.com/watch?v=FH5oDFgLSs4 for example output
cap = cv2.VideoCapture(0)

face_cascade = cv2.CascadeClassifier("/usr/share/opencv/haarcascades/haarcascade_frontalface_default.xml")
eye_cascade =  cv2.CascadeClassifier("/usr/share/opencv/haarcascades/haarcascade_eye.xml")

fourcc = cv2.cv.CV_FOURCC(*'XVID')
out = cv2.VideoWriter('output.avi',fourcc, 15, (640,480))

while(cap.isOpened()):
    ret, frame = cap.read()
    if ret != True:
        break

    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    faces = face_cascade.detectMultiScale(gray, 1.3, 5)
    for (x,y,w,h) in faces:
        cv2.rectangle(frame, (x,y), (x+w,y+h), (120,120,120), -1) 
        roi_gray = gray[y:y+h, x:x+w]
        roi_color = frame[y:y+h, x:x+w] 

        eyes = eye_cascade.detectMultiScale(roi_gray)
        for (ex,ey,ew,eh) in eyes:
            cv2.rectangle(roi_color, (ex,ey), (ex+ew,ey+eh), (32,32,32), -1) 

    
    out.write(frame)
    cv2.imshow('frame', frame)

    if cv2.waitKey(50) & 0xFF == ord('q'):
        break

cap.release()
out.release()
cv2.destroyAllWindows()