使用MATLAB获取视频中每一帧的图像

MATLAB Version: 2010a

OS: Windows 7

这段代码可将avi视频中的每一帧画面截取出来，并转存到单独的文件夹中。

PS：下面的是matlab代码。

 1 clear;
 2 clc;
 3 
 4  % choose a video file
 5 [filename, pathname] = uigetfile('*.avi', 'choose a video file', 'video.avi', 'Multiselect', 'on');
 6 
 7 fprintf('filename = %s \npathname = %s \n\n', filename, pathname);
 8 
 9  if ischar(filename)
10     
11     fprintf('choose file success.\n\n');
12     
13     video = mmreader([pathname filename]);
14     len = video.NumberOfFrames; % get length of the video
15     
16     fprintf('length of video : %d \n\n', len);
17     
18     dir=strcat(pathname,strrep(filename,'.avi',''),'\pic');
19     mkdir(dir); % create folder for saving picture
20     fn=strrep(filename,'.avi',''); 
21     
22     for k = 1 : len - 1
23         frame = rgb2gray(read(video, k));
24         imwrite(frame,strcat(dir,'\',fn,'-avi-000',int2str(k),'.bmp'),'bmp'); 
25     end
26     
27 end