import cv2

cap = cv2.VideoCapture(0)

while cap.isOpened():
    ret, frame = cap.read()
    frame = cv2.rotate(frame, rotateCode = 1)
    cv2.imshow("frame", frame)
    
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
  
cap.release()
cv2.destroyAllWindows()