如何使用OpenCV Python从视频获取图像

本文介绍了如何使用OpenCV Python从视频获取图像的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想从视频中获取图像并将其以'.jpeg'或'.png'格式存储，请帮助我如何使用opencv做到这一点.我的代码是

I want to get image from video and store it in '.jpeg' or '.png' format please help me how to do this with opencv My code is

import cv2 vidcap = cv2.VideoCapture('video1.mp4') success,image = vidcap.read() count = 0; print "I am in success" while success: success,image = vidcap.read() cv2.imwrite("frame%d.jpg" % count, image) # save frame as JPEG file if cv2.waitKey(10) == 27: # exit if Escape is hit break count += 1

在这里，我试图逐帧从视频中获取图像并将其另存为frame1，frame2，frame3

Here i am trying to get the image from video frame by frame and save it as frame1,frame2,frame3

推荐答案

这是我用来读取视频并保存帧的方法:

This is what I use to read in a video and save off the frames:

import cv2 import os def video_to_frames(video, path_output_dir): # extract frames from a video and save to directory as 'x.png' where # x is the frame index vidcap = cv2.VideoCapture(video) count = 0 while vidcap.isOpened(): success, image = vidcap.read() if success: cv2.imwrite(os.path.join(path_output_dir, '%d.png') % count, image) count += 1 else: break cv2.destroyAllWindows() vidcap.release() video_to_frames('../somepath/myvid.mp4', '../somepath/out')