MATLAB视频读取转换为图片

转换mp4到jpg格式的图片：

% convert .mp4 to jpg picture
t=\'C:\Documents and Settings\luokh\桌面\Matlab编程\Matlab编程\数据资料\finger.mp4\';
obj = VideoReader(t);
for i=1:20
    frame = read(obj,i);
    temp=strcat(\'C:\Documents and Settings\luokh\桌面\Matlab编程\Matlab编程\数据资料\fingerOUT\\',num2str(i),\'.\',\'jpg\');
    imwrite(frame,temp);
end
clear all
%end