opencv图片压缩视频并读取

import os
import cv2
import numpy as np
import time

path = './new_image/'
filelist = os.listdir(path)

fps = 0.5    # 视频每秒0.5帧
# 每张图片的尺寸必须是一样的
size = (512, 512)
# opencv读取的视频只能是avi格式
video = cv2.VideoWriter("VideoTest1.avi", cv2.VideoWriter_fourcc("M", "J","P","G"), fps, size)    # 视频保存在当前目录下

for item in filelist:
    if item.endswith('.jpg'):
        # 找到路径中所有后缀名为.png的文件，可以更换为.jpg或其它
        item = path + item
        img = cv2.imread(item)
        video.write(img)
        time.sleep(2)

print("#" * 100)

# 读取压缩完的视频
cap_cramer = cv2.VideoCapture("./VideoTest1.avi")
while True:
    ret, frame = cap_cramer.read()
    print("ret......", ret)
    print(frame)
    if ret is False:
        break
    cv2.imshow("frame", frame)
    cv2.waitKey(2000)