mp42jpg & 翻转

#coding=utf-8
import os
import cv2
from PIL import Image

def unlock_movie(path):
  cap = cv2.VideoCapture(path)
  suc = cap.isOpened()  # 是否成功打开
  frame_count = 0
  while suc:
      frame_count += 1
      suc, frame = cap.read()
      params = []
      params.append(2)  # params.append(1)
      if frame_count%20==0:
          cv2.imwrite('/night1/night%d.jpg' % frame_count, frame, params)

  cap.release()
  print('unlock movie: ', frame_count)


if __name__ == '__main__':
  PATH_TO_MOVIES = "/_camera_image_raw.mp4"
  unlock_movie(PATH_TO_MOVIES)

对存下来的图片翻转

#-*- coding: UTF-8 -*- 
import os
from PIL import Image
test_dir="/home/zhaohuaqing/day1/"
for f in os.listdir(test_dir):
    im = Image.open(test_dir+f)
    im_rotate = im.rotate(180) 
    im_rotate.save(test_dir+f)