Python使用pillow结合opencv-python录屏

pip install numpy opencv-python pillow

import threading
import time

from selenium import webdriver
from PIL import ImageGrab
import numpy as np
import cv2

FPS = 20  # 录制帧数


def shot(dr):
    screen = ImageGrab.grab()
    height, width = screen.size
    video = cv2.VideoWriter('video.avi', cv2.VideoWriter_fourcc(*'XVID'), FPS, (height, width))
    while True:
        capture = ImageGrab.grab()  # 抓取屏幕
        frame = cv2.cvtColor(np.array(capture), cv2.COLOR_RGB2BGR)
        [video.write(frame) for i in range(15)]  # 一次填15帧相同图像
        try:
            dr.title
        except Exception as ex:
            print(ex)
            break
        # cv2.imshow('imm', np.zeros((200,200), np.uint8))
        # if cv2.waitKey(1) & 0xFF == ord('q'):
        #     break
    video.release()

    # cv2.destroyAllWindows()


dr = webdriver.Chrome()
t = threading.Thread(target=shot, args=(dr,))  # 新建线程
t.start()  # 启动截图线程

dr.get('https://www.baidu.com')
time.sleep(1)
dr.find_element('id', 'kw').send_keys('简书 韩志超')
dr.find_element('id', 'su').click()
time.sleep(1)
dr.get('https://www.qq.com')
dr.back()
time.sleep(3)
dr.quit()

问题，录制出的视频依然像幻灯片一样。