how to change color space of any video

how to change color space of any video, e.g video in rgb color space is converting into hsv or gray?

Answer 1

[KSSV]

vidObj = VideoReader('C:\Users\Public\Videos\Sample Videos\Wildlife.wmv');  % video file 
%% Read the video frame by frame 
numFrames = 0;
iwant = cell([],1) ; 
while hasFrame(vidObj)
    F = readFrame(vidObj);    
    numFrames = numFrames + 1;   
    imagesc(F)
    drawnow
    iwant{numFrames} = F ;
end

%% Write to video
v = VideoWriter('myFile','Archival');
v.VideoCompressionMethod

open(v)
for i = 1:numFrames
    writeVideo(v,rgb2gray(iwant{i}))
end
close(v)

[Awais Khan]

thanks for your answering, but tell me one thing if you know that the resulted video as a execution of above code is in mj2 extension, if we want to get in avi extension, at which place we makes changes for it. again thanks for sharing above code it is working well.

[KSSV]

Read about videowriter. You may use some thing like below:

v = VideoWriter('newfile.avi','Motion JPEG AVI');

[Awais Khan]

done its working