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