python工具-将视频按帧截取图片（附代码）

1 args = parser.parse_args([‘--input‘,r‘F:\data_video\IMG_4395.MOV‘,‘--output‘,r‘F:data_rgb_pic\7video‘])

 1 import cv2
 2 import argparse
 3 import os
 4 def parse_args():
 5     """
 6     Parse input arguments
 7     """
 8     parser = argparse.ArgumentParser(description=‘Process pic‘)
 9     parser.add_argument(‘--input‘, help=‘video to process‘, dest=‘input‘, default=None, type=str)
10     parser.add_argument(‘--output‘, help=‘pic to store‘, dest=‘output‘, default=None, type=str)
11     #default为间隔多少帧截取一张图片
12     parser.add_argument(‘--skip_frame‘, dest=‘skip_frame‘, help=‘skip number of video‘, default=100, type=int)
13     #input为输入视频的路径 ，output为输出存放图片的路径
14     args = parser.parse_args([‘--input‘,‘‘,‘--output‘,‘‘])
15     return args
16  
17 def process_video(i_video, o_video, num):
18     cap = cv2.VideoCapture(i_video)
19     num_frame = cap.get(cv2.CAP_PROP_FRAME_COUNT)
20     expand_name = ‘.jpg‘
21     if not cap.isOpened():
22         print("Please check the path.")
23     cnt = 0
24     count = 0
25     while 1:
26         ret, frame = cap.read()
27         cnt += 1
28         #  how
29         # many
30         # frame
31         # to
32         # cut
33         if cnt % num == 0:
34             count += 1
35             cv2.imwrite(os.path.join(o_video, str(count) + expand_name), frame)
36  
37         if not ret:
38             break
39  
40 if __name__ == ‘__main__‘:
41     args = parse_args()
42     if not os.path.exists(args.output):
43         os.makedirs(args.output)
44     print(‘Called with args:‘)
45     print(args)
46     process_video(args.input, args.output, args.skip_frame)