MATLAB读取视频转图片

在matlab自带的example上进行修改，代码如下,通过gui的方式选取文件，创建文件夹，并转为jpg图片

[filename,path]=uigetfile({
    
    '*.avi';'*.jpg';'*.*'});
videoname = [path filename];
v = VideoReader(videoname);
%创建新的文件夹
inds = strfind(filename,'.');
new_dir = [path filename(1:inds(end)-1)];
if ~exist(new_dir,'dir')
mkdir(new_dir);
end

v.CurrentTime = 0;
currAxes = axes;
cnt = 1;
while hasFrame(v)
    vidFrame = readFrame(v);
    image(vidFrame, 'Parent', currAxes);
    imshow(vidFrame);
    title(num2str(cnt));
    cnt = cnt +1;

    pause(1/v.FrameRate);
%存为jpg图片
    imwrite(vidFrame,[new_dir '\' num2str(cnt) '.jpg']);
end

另外一个版本的将MP4格式的视频转图片：

pathin = 'G:\video\';
% [path,name] = uigetfile();
i = 1;
video_name = 'test_video';
readerobj = VideoReader([pathin,video_name,'.mp4'],'tag','myreader1');
while hasFrame(readerobj)
    vidframes = readFrame(readerobj);
    path_out = [pathin video_name '\'];
    if ~exist(path_out,'dir')
        mkdir(path_out);
    end
    imwrite(vidframes,[path_out num2str(i) '.jpg']);
    i = i+1;
end

以及将jpg图片转为avi格式视频的代码：

frame_jpg = 957 %图片的数量（从1到957）
v = VideoWriter('generate.avi');
open(v)
i = 1;
while(i<frame_jpg)
    A = imread(['E:\demofigs\' num2str(i) '.jpg']);
    writeVideo(v,A);
    i = i+1;
end
close(v)