将视频转换为灰度python

Question

我正在尝试将视频转换为灰度，但无法正常工作。这是我使用的代码。

import cv2

capture = cv2.VideoCapture("C:/Users/firas/Desktop/ASU/Research Wu_/v3/experiment_no graphs.mp4")
fourcc = cv2.VideoWriter_fourcc(*'MJPG')
out = cv2.VideoWriter('BW.avi', fourcc, 5, (128,72))  

while(True):

    ret, frame = capture.read()

    grayFrame = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

    cv2.imshow('video gray', grayFrame)
    cv2.imshow('video original', frame)
    out.write(grayFrame)

    if cv2.waitKey(1) == ord('q'):
        break

out.release()  
capture.release()
cv2.destroyAllWindows()