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。

clear;
clc;

 % choose a video file
[filename, pathname] = uigetfile('*.avi', 'choose a video file', 'video.avi', 'Multiselect', 'on');

fprintf('filename = %s \npathname = %s \n\n', filename, pathname);

 if ischar(filename)
    
    fprintf('choose file success.\n\n');
    
    video = mmreader([pathname filename]);
    len = video.NumberOfFrames; % get length of the video
    
    fprintf('length of video : %d \n\n', len);
    
    dir=strcat(pathname,strrep(filename,'.avi',''),'\pic');
    mkdir(dir); % create folder for saving picture
    fn=strrep(filename,'.avi',''); 
    
    for k = 1 : len - 1
        frame = rgb2gray(read(video, k));
        imwrite(frame,strcat(dir,'\',fn,'-avi-000',int2str(k),'.bmp'),'bmp'); 
    end
    
end