用MATLAB实现屏幕截屏的代码

function screen_capture(movie_name,recording_time)

%Can be used to record any screen activity and output

%the recorded actions as video file (MOVIE.avi). It also saves the frames used to

%create the movie in a jpg format frames. The images are named as

%scrcapture -frame number- .jpg

%For example the first frame is named scrcapture1.jpg

%The recording time is almost identical to the actual cpu time.

%The quality of the video is excellent, but the size is big. One is advised

%to record short videos(order of minutes).For even better quality, one could replace the

% png format to jpg(simply uncomment the respective commands).

%                      to call the function, one types:

%

%                                            screen_capture(movie_name,recording_time)

%                     where

%   movie_name: is a string representing the name of  the movie

%   recording_time: is the length of the capturing (in seconds)

%To try, one might use the following example:

%                                                                 screen_capture('movie',30)

%When the code is done writing the movie, a gong sound will be played

%to inform the user that the movie is finished.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%This function is written by :

%                             Nassim Khaled

%                             Wayne State University

%                             Phd Candidate

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

movie_name1=strcat(movie_name,'.avi')

mov = avifile(movie_name1);

count=0;

robo = java.awt.Robot;

t = java.awt.Toolkit.getDefaultToolkit();

rectangle = java.awt.Rectangle(t.getScreenSize());

 number_of_frames=round(recording_time/0.65);

 display_time_of_frame=10;

 for i=1:number_of_frames

    name1=strcat('scrcapture',num2str(i),'.png');

    %     name1=strcat('scrcapture',num2str(i),'.jpg');

    image = robo.createScreenCapture(rectangle);

    filehandle = java.io.File(name1);

    javax.imageio.ImageIO.write(image,'png',filehandle); 

%     javax.imageio.ImageIO.write(image,'jpg',filehandle); 

end

for i=1:number_of_frames

name1=strcat('scrcapture',num2str(i),'.png');

%     name1=strcat('scrcapture',num2str(i),'.jpg');

    a=imread(name1);

    while count<display_time_of_frame

        count=count+1;

        F = im2frame(a);

        mov=addframe(mov,F);

    end

    count=0;

end

close all

mov=close(mov);

load gong;

% wavplay(y,Fs)