Python OpenCVからpng画像を読み出してjpg画像に変換する方法

import os
import cv2
import sys
import numpy as np
 
path = "F:\\ImageLib\\VRWorks_360_Video _SDK_1.1\\footage14\\"
print(path)
 
for filename in os.listdir(path):
  if os.path.splitext(filename)[1] == '.png':
    # print(filename)
    img = cv2.imread(path + filename)
    print(filename.replace(".png",".jpg"))
    newfilename = filename.replace(".png",".jpg")
    # cv2.imshow("Image",img)
    # cv2.waitKey(0)
    cv2.imwrite(path + newfilename,img)