How can I make a movie with one multidimensional matrix in MATLAB

Question

yogan sganzerla 2017-9-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/358855-how-can-i-make-a-movie-with-one-multidimensional-matrix-in-matlab

编辑： OCDER 2017-9-29

T.mat

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.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

OCDER 2017-9-28

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/358855-how-can-i-make-a-movie-with-one-multidimensional-matrix-in-matlab#answer_283537

在 MATLAB Online 中打开

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);

4 个评论
显示 2更早的评论隐藏 2更早的评论

yogan sganzerla 2017-9-29

编辑：yogan sganzerla 2017-9-29

Swis_Quadrada_V2.m

Perfect Donald, It worked very well. I am adding a new version of the code to show how it is working now. The movie is playing just the last position of the matrix. Why it's happening? Cheers

OCDER 2017-9-29

编辑：OCDER 2017-9-29

在 MATLAB Online 中打开

It's only saving the current figure, and not all figures.

set(gca,'nextplot','replacechildren'); 
for f = 1:size(T,3)
    frame = getframe(gcf);  %Only saving one figure, regardless of frame f
    writeVideo(VidObj,frame);
end
close(VidObj);

Are you plotting T somewhere and then saving a plot of T(:, :, f)? If so, you need to plot inside the for loop. If you want to save T only after normalizing, use this:

T = T / max(T(:));
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);