影片播放时间

Question

我已经编写了用于逐帧记录屏幕的代码，但是保存文件后，视频播放非常快。我想以正常速度播放视频。

我在ubuntu 16.04上尝试过的代码

import numpy as np
import cv2

# windows, mac

# from PIL import ImageGrab

# linux

import pyscreenshot as ImageGrab
fourcc = cv2.VideoWriter_fourcc(*'MJPG')
out = cv2.VideoWriter("output.avi",fourcc,60,(1600,900))

while True:
    # grab fullscreen
    frame = ImageGrab.grab()
    frame = np.array(frame)
    frame = cv2.cvtColor(frame,cv2.COLOR_BGR2RGB)
    out.write(frame)
    if cv2.waitKey(50)==27:
        break
out.release()
cv2.destroyAllWindows()