在Matlab中创建视频的方法

Question

在Matlab中创建视频的可能性是什么？我经过搜索后发现，主要有3个工具箱可用于该领域，包括图像处理，图像采集和视觉控制...但是如果没有它们，我怎么能做，只是从头开始创建视频？我对概述的各种方法感兴趣，但是无法在互联网上找到任何不错的教程或一致的信息来源。

Answer 1

以下是在（核心）MATLAB中创建电影的一些不同方法。

电影2AVI

（已弃用，请改用VIDEOWRITER）

%# figure

figure, set(gcf, 'Color','white')

Z = peaks; surf(Z);  axis tight

set(gca, 'nextplot','replacechildren', 'Visible','off');

%# preallocate

nFrames = 20;

mov(1:nFrames) = struct('cdata',[], 'colormap',[]);

%# create movie

for k=1:nFrames

   surf(sin(2*pi*k/20)*Z, Z)

   mov(k) = getframe(gca);

end

close(gcf)

%# save as AVI file, and open it using system video player

movie2avi(mov, 'myPeaks1.avi', 'compression','None', 'fps',10);

winopen('myPeaks1.avi')

AVIFILE

（已弃用，请改用VIDEOWRITER）

%# figure

figure, set(gcf, 'Color','white')

Z = peaks; surf(Z);  axis tight

set(gca, 'nextplot','replacechildren', 'Visible','off');

%# create AVI object

nFrames = 20;

aviobj = avifile('myPeaks2.avi', 'fps',10);

%# create movie

for k=1:nFrames

   surf(sin(2*pi*k/20)*Z, Z)

   aviobj = addframe(aviobj, getframe(gca));

end

close(gcf)

%# save as AVI file, and open it using system video player

aviobj = close(aviobj);

winopen('myPeaks2.avi')

视频制作人

%# figure

figure, set(gcf, 'Color','white')

Z = peaks; surf(Z);  axis tight

set(gca, 'nextplot','replacechildren', 'Visible','off');

%# create AVI object

nFrames = 20;

vidObj = VideoWriter('myPeaks3.avi');

vidObj.Quality = 100;

vidObj.FrameRate = 10;

open(vidObj);

%# create movie

for k=1:nFrames

   surf(sin(2*pi*k/20)*Z, Z)

   writeVideo(vidObj, getframe(gca));

end

close(gcf)

%# save as AVI file, and open it using system video player

close(vidObj);

winopen('myPeaks3.avi')

写入

（从技术上讲不是电影，而是GIF动画图片）

%# figure

figure, set(gcf, 'Color','white')

Z = peaks; surf(Z);  axis tight

set(gca, 'nextplot','replacechildren', 'Visible','off');

%# preallocate

nFrames = 20;

f = getframe(gca);

[f,map] = rgb2ind(f.cdata, 256, 'nodither');

mov = repmat(f, [1 1 1 nFrames]);

%# create movie

for k=1:nFrames

    surf(sin(2*pi*k/20)*Z, Z)

    f = getframe(gca);

    mov(:,:,1,k) = rgb2ind(f.cdata, map, 'nodither');

end

close(gcf)

%# create GIF and open

imwrite(mov, map, 'myPeaks4.gif', 'DelayTime',0, 'LoopCount',inf)

winopen('myPeaks4.gif')