clc;
clear;
video_file='50.avi';
video=VideoReader(video_file);
frame_number=floor(video.Duration * video.FrameRate);
for i=1:frame_number
image_name=strcat('',num2str(i));
image_name=strcat(image_name,'.jpg');
I=read(video,i);
imwrite(I,image_name,'jpg');
I=[];
end