读取视频帧,将YUV视频导出生成BMP图片形式--matlab

close all;
clear
fid = fopen('rec.yuv','r')        % 此处修改自己的文件名
row=176;col=144;              %大小
frames=10;                         %要转换的帧数
Y=zeros(row,col,frames);
U=zeros(row/2,col/2,frames);
V=zeros(row/2,col/2,frames);
UU=zeros(row,col,frames);
VV=zeros(row,col,frames);


for frame=1:frames
[Y(:,:,frame),count] = fread(fid,[row,col],'uchar');
[U(:,:,frame),count1]=fread(fid,[row/2,col/2],'uchar');
[V(:,:,frame),count2]=fread(fid,[row/2,col/2],'uchar');
%fclose(fid) 
%[Y,U,V]=Set_yuv(Y,U,V,156,152,frame);
%figure,imshow(Y);


UU(1:2:row-1,1:2:col-1,frame)=U(:,:,frame);
UU(1:2:row-1,2:2:col,frame)=U(:,:,frame);
UU(2:2:row,1:2:col-1,frame)=U(:,:,frame);
UU(2:2:row,2:2:col,frame)=U(:,:,frame);


VV(1:2:row-1,1:2:col-1,frame)=V(:,:,frame);
VV(1:2:row-1,2:2:col,frame)=V(:,:,frame);
VV(2:2:row,1:2:col-1,frame)=V(:,:,frame);
VV(2:2:row,2:2:col,frame)=V(:,:,frame);


R = Y + 1.140 * (VV-128 );
G = Y + 0.395 * (UU-128 ) - 0.581 *(VV-128);
B = Y + 2.032 *(UU-128);


for i=1:row
for j=1:col
if R(i,j,frame)<0
R(i,j,frame)=0;
end
if R(i,j,frame)>255
R(i,j,frame)=255;
end
if G(i,j,frame)<0
G(i,j,frame)=0;
end
if G(i,j,frame)>255
G(i,j,frame)=255;
end
if B(i,j,frame)<0
B(i,j,frame)=0;
end
if B(i,j,frame)>255
B(i,j,frame)=255;
end
end
end
R=R/255;G=G/255;B=B/255;
%X=[R',G',B'];
images(:,:,1)=R(:,:,frame)';
images(:,:,2)=G(:,:,frame)';
images(:,:,3)=B(:,:,frame)';
%figure,imshow(images)
imwrite(images,['C:\Users\wyh\Documents\MATLAB\pic',num2str(frame), '.jpg'])           %图片保存路径
%M(frame) =im2frame(X,map);
end
%movie(M,10,30)