计算视频质量BDBR 和BD-PSNR的matlab代码

以下是计算视频质量 BDBR 和 BD-PSNR 的 Matlab 代码：

clear all;
close all;
clc;

% 读取原始视频和压缩视频
origVideo = VideoReader('original_video.mp4');
compVideo = VideoReader('compressed_video.mp4');

% 获取视频的帧数和帧率
numFrames = origVideo.NumberOfFrames;
frameRate = origVideo.FrameRate;

% 初始化变量
origFrames = zeros(origVideo.Height, origVideo.Width, numFrames);
compFrames = zeros(compVideo.Height, compVideo.Width, numFrames);
origPsnr = zeros(numFrames, 1);
compPsnr = zeros(numFrames, 1);
bdPsnr = zeros(numFrames, 1);

% 逐帧读取原始视频和压缩视频
for i = 1:numFrames
    origFrames(:, :, i) = read(origVideo, i);
    compFrames(:, :, i) = read(compVideo, i);
    
    % 计算原始视频和压缩视频的 PSNR
    origPsnr(i) = psnr(compFrames(:, :, i), origFrames(:, :, i));
    compPsnr(i) = psnr(compFrames(:, :, i), origFrames(:, :, i), 255);
end

% 计算 BD-PSNR
bdPsnr = origPsnr - compPsnr;

% 计算 BDBR
bitrateOrig = origVideo.BitRate / frameRate;
bitrateComp = compVideo.BitRate / frameRate;
bdbr = (bitrateComp - bitrateOrig) / bitrateOrig;

% 输出结果
fprintf('BD-PSNR = %.2f dB\n', mean(bdPsnr));
fprintf('BDBR = %.2f%%\n', bdbr * 100);

其中，需要将 `original_video.mp4` 和 `compressed_video.mp4` 替换成对应的视频文件名。执行后，会输出 BD-PSNR 和 BDBR 的计算结果。