MATLAB: How to make a movie with one multidimensional matrix in MATLAB

imageMATLABmatrixmatrix manipulationvideovideo processing

Hello, I have a multidimensional matrix in MatLab -> T(41,41,501) and I would like to memorize all this matrix in a movie. What should I do?

I read that the function is VideoWriter but I couldn't make the video. I am attaching the matrix.

cheers.

Best Answer

VidObj = VideoWriter('movie.avi', 'Uncompressed AVI'); %set your file name and video compression
VidObj.FrameRate = 30; %set your frame rate
open(VidObj);
for f = 1:size(T, 3)
    writeVideo(VidObj, T(:, :, f));
end
close(VidObj);

Related Solutions

MATLAB: Using writeVideo command & result…

Julia - the default frame rate for the VideoWriter object is 30 frames per second (see VideoWriter class for details).

I noticed that you put a one second pause in your for loop. If you want only one frame to appear per second, then you just need to set this rate in vidObj

 vidObj = VideoWriter('pr_lgm_r1_ccsm4.avi');
 vidObj.FrameRate = 1;
 open(vidObj);

Try the above and see what happens!

MATLAB: How to convert the video (>2 GB) to uncompressed AVI grayscale in MATLAB 7.12 (R2011a)

In order to use the VideoWriter to create an uncompressed AVI in grayscale, you need to create a VideoWriter object with the profile set to 'Uncompressed AVI'. Then create a movie structure that has grayscale frames by using the RGB2GRAY function and use the WRITEVIDEO function to write the frames in the movie to the AVI file. Then close the VideoWriter object using the CLOSE function.

Please refer to the following sample code:

% Read sample video.
xyloObj = VideoReader('xylophone.mpg');
% Get details.
nFrames = xyloObj.NumberOfFrames;
vidHeight = xyloObj.Height;
vidWidth = xyloObj.Width;
% Define colormap
map = [(0:255)' (0:255)' (0:255)']/255;
% Preallocate movie structure.
mov(1:nFrames) = struct('cdata', zeros(vidHeight, vidWidth, 'uint8'),'colormap', map);
% Read one frame at a time.
for k = 1 : nFrames
      mov(k).cdata = rgb2gray(read(xyloObj, k));
end
% Prepare the new file.
vidObj = VideoWriter('videowrite.avi','Uncompressed AVI');
open(vidObj);
% Write video
writeVideo(vidObj, mov);
% Close video writer object
close(vidObj);

Best Answer

Related Solutions

MATLAB: Using writeVideo command & result…

MATLAB: How to convert the video (>2 GB) to uncompressed AVI grayscale in MATLAB 7.12 (R2011a)

Related Question