I want to get a single frame from yuv formate video file

clear;
vlc='balloons_c_1_1024x768-.yuv';
vld='balloons_d_1_1024x768.yuv';
vrc='balloons_c_5_1024x768.yuv';
vrd='balloons_d_5_1024x768.yuv';
function[y,u,v]=Test2(vid,width,height,nframe)

%r(:,nframe)=y(:,:,nframe)+1.140*v(:,:,nframe);
%g(:,nframe)=y(:,:,nframe)-0.395*u(:,:,nframe)-0.581*v(:,:,nframe);
%b(:,nframe)=y(:,:,nframe)+2.032*u(:,:,nframe);
fid=fopen(vid,'r');
stream=fread(fid,'*uchar');
frame_length=1.5*width*height;
y=uint8(zeros(height,width,nframe));
u=uint8(zeros(height/2,width/2,nframe));
v=uint8(zeros(height/2,width/2,nframe));

for iframe=1:nframe
    
    frame=stream((iframe-1)*frame_length+1:iframe*frame_length); 
    
    yImage = reshape(frame(1:width*height), width, height)';
    uImage = reshape(frame(width*height+1:1.25*width*height), width/2, height/2)';
    vImage = reshape(frame(1.25*width*height+1:1.5*width*height), width/2, height/2)';
    
    y(:,:,nframe)=yImage;
    u(:,:,nframe)=uImage;
    v(:,:,nframe)=vImage;
end
%....................................................
height=768;
width=1024;
nframe=500;
[Y,U,V]=Test2(vlc,width,height,nframe);
imshow(Y(:,:,125));

Answer 1

[Naga]

Hi Sahar,

The code incorrectly assigns the Y, U, and V components to the same index nframe, causing all frames to overwrite each other. This results in only the last frame being stored, losing all previous frames.

Assign the components to iframe instead of nframe to ensure each frame is stored uniquely:

% Correct frame indexing
y(:,:,iframe) = currentYComponent;
u(:,:,iframe) = currentUComponent;
v(:,:,iframe) = currentVComponent;