Matlab 读写yuv文件

clear all; clc;fid = fopen('Data/Testing/down.yuv','r'); %读入文件fod = fopen('Data/Testing/test.yuv','w'); %输出文件row=768/2;col=1024/2; %图像的高、宽frames=97; % total=97 %序列的帧数for frame=1:frames %读入文件 将yuv转换为rgb，并用imshow显示  %  im_l_y=fread(fid,[row,col],'uchar');  %错误的读入    im_l_y = zeros(row,col); %Y    for i1 = 1:row        im_l_y(i1,:) = fread(fid,col);  %读取数据到矩阵中     end    im_l_cb = zeros(row/2,col/2); %cb    for i2 = 1:row/2        im_l_cb(i2,:) = fread(fid,col/2);      end    im_l_cr = zeros(row/2,col/2); %cr    for i3 = 1:row/2        im_l_cr(i3,:) = fread(fid,col/2);      end    %由于输入的yuv文件为4:2:0，所以CbCr要改变大小，    %否则im_l_ycbcr(:, :, 2) =im_l_cb;会出现错误    im_l_cb = imresize(im_l_cb, [row, col], 'bicubic');%改变图像的大小    im_l_cr = imresize(im_l_cr, [row, col], 'bicubic');    im_l_ycbcr = zeros([row, col, 3]);    im_l_ycbcr(:, :, 1) = im_l_y;    im_l_ycbcr(:, :, 2) = im_l_cb;    im_l_ycbcr(:, :, 3) = im_l_cr;    im_l = ycbcr2rgb(uint8(im_l_ycbcr)); %将YCbCr转换为rgb  %  figure, imshow(im_l);title('Down');  %输出文件  将rgb转换为yuv    im_t_ycbcr = rgb2ycbcr(im_l);  %将rgb转换为YCbCr    im_t_y = im_t_ycbcr(:, :, 1);  %Y    im_t_cb = im_t_ycbcr(:, :, 2); %Cb    im_t_cr = im_t_ycbcr(:, :, 3); %Cr    im_l_cb = imresize(im_l_cb, [row/2, col/2], 'bicubic');%改变图像的大小    im_l_cr = imresize(im_l_cr, [row/2, col/2], 'bicubic');    for i1 = 1:row        fwrite(fod,im_l_y(i1,:));  %输出到文件中    end    for i1 = 1:row/2       fwrite(fod,im_l_cb(i1,:));      end    for i1 = 1:row/2       fwrite(fod,im_l_cr(i1,:));     endend
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