使用python-cv2如何实现视频的分解与合成

import cv2
cap = cv2.VideoCapture('1.mp4')
isOpened = cap.isOpened  # 判断视频是否可读
print(isOpened)
fps = cap.get(cv2.CAP_PROP_FPS) # 获取图像的帧，即该视频每秒有多少张图片
width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH)) # 获取图像的宽度和高度
height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
print(fps, width, height)
i = 0
while(isOpened):
  if i == 10:
    break
    
  # 读取每一帧，falg表示是否读取成功，frame为图片的内容
  (flag, frame) = cap.read()  
  filename = 'img' + str(i) + '.jpg' # 文件的名字
  if flag:
    cv2.imwrite(filename, frame, [cv2.IMWRITE_JPEG_QUALITY,100]) # 保存图片
  i += 1

import cv2
img = cv2.imread('img0.jpg')
width = img.shape[0]
height = img.shape[1]
size = (height, width)
print(size)

videoname = "2.mp4"  # 要创建的视频文件名称 
fourcc = cv2.VideoWriter_fourcc('M', 'J', 'P', 'G') # 编码器 
fps = 5 # 帧率

# 1.要创建的视频文件名称 2.编码器 3.帧率 4.size
videoWrite = cv2.VideoWriter(videoname,fourcc, fps, size)
for i in range(10):
  filename = 'img' + str(i) + '.jpg'
  img = cv2.imread(filename)
  videoWrite.write(img) # 写入