video2yuv

[baidut]

Author: @baidut
Brief: convert video file to .yuv

1. 将摄像头采集到的数据存成YUV文件
   • 帧率：15fps
   • 尺寸：320x240
   • 色度格式：4：2：0
2. 用yuvviewer观察正确性

inFile = 'test.mp4';
outFile = 'output.yuv';
vidObj = VideoReader(inFile);
fid = fopen(outFile,'wb');
hold on;
while hasFrame(vidObj)
    vidFrame = readFrame(vidObj);

  R = double(vidFrame(:,:,1));
    G = double(vidFrame(:,:,2));
    B = double(vidFrame(:,:,3));

  D = [.299  .587  .144;
    -.147 -.289  .436;
     .615 -.515 -.1];
  C = [0; 128; 128];

    Y = D(1,1) * R + D(1,2) * G + D(1,3) * B + C(1);
    U = D(2,1) * R + D(2,2) * G + D(2,3) * B + C(2);
    V = D(3,1) * R + D(3,2) * G + D(3,3) * B + C(3);

    Y4 = uint8(round(Y));
    U4 = uint8(round(U));
    V4 = uint8(round(V));

    U1 = U4(1:2:end,1:2:end);
    V1 = V4(1:2:end,1:2:end);

    fwrite(fid,Y4','uint8');
    fwrite(fid,U1','uint8');
    fwrite(fid,V1','uint8');
end
fclose(fid);

参考资料

1. MathWorks-Image Format Conversion: RGB to YUV
2. 用Matlab读写YUV文件(备忘)
3. ilovematlab-求教Matlab图像RGB转YUV