Python：按帧提取视频中的图片

实现代码如下，

import os
import sys
import cv2
import time

video_file = sys.argv[1]

if len(video_file) == 0:
	print('video_file is empty, check input parameter please.')
	sys.exit(0)

if not os.path.exists(video_file):
	print('video_file not exists, check input parameter please.')
	sys.exit(0)

vc = cv2.VideoCapture(video_file)

if vc.isOpened():
	rval, frame = vc.read()
else:
	rval = False

str_video_filename = ''
if video_file.rfind('/') == -1:
	str_video_filename = video_file.split('.')[0]
else:
	str_video_filename = video_file[video_file.rfind('/') + 1 : video_file.rfind('.')]

if len(str_video_filename) == 0:
	print('video_file is empty, check input parameter please.')
	sys.exit(0)

#print(str_video_filename)
#time.sleep(3)

if not os.path.exists('../images'):
	os.makedirs('../images/%s'%str_video_filename)
else:
	if not os.path.exists('../images/%s'%str_video_filename):
		os.mkdir('../images/%s'%str_video_filename)

nFrameNum = 0
while rval:
	rval, frame = vc.read()
	str_frame_num = '%04d' % nFrameNum;
	str_jpg = '../images/{0}/{0}_{1}.jpg'.format(str_video_filename, str_frame_num)
	#print(str_jpg)
	#print(frame)
	cv2.imwrite(str_jpg, frame)
	cv2.waitKey(1)
	nFrameNum += 1
vc.release()

参考：

https://blog.csdn.net/a486259/article/details/84787288

https://blog.csdn.net/qq_38214193/article/details/80997924

待更新