matlab - Make a movie with pcolor without getframe

Question

I have a simulation running in MATLAB and I want to make a movie from the frames. There are more than 4000 frames at least 1600x1600 in size. Each frame is a 2D matrix. I can visualize them with pcolor and make a movie using getframe. But as the size is huge and the simulation is running overnight, I will run into alot of problems with screen savers, etc. Is there any better way to do this in MATLAB? Solutions with other softwares is also OK.

Answer 1

就在使用 绘制图片之前pcolor()，尝试使用创建一个不可见的图形，h = figure('visible', 'off');并使用addframe(avi_file, h);它为来自不可见图形的 avi 添加一个框架。更详细的讨论可以在Render MATLAB figure in memory中找到

更新：似乎没有办法getframe()在无头 Matlab 中使用框架，因此使用选项VideoWriter和movie2avi将不起作用。如果有人成功了，请在评论部分纠正我。

Answer 2

使用@Bee answer中提供的链接和一些修补问题可以像这样解决：

aviobj=VideoWriter(filename);
open(aviobj);
hFig=figure('Visible','Off');

for loop comes here
    cla

    %All Drawing stuff    

    img = hardcopy(hFig, '-dzbuffer', '-r0');
    writeVideo(aviobj, im2frame(img));
end
close(aviobj)

请注意，它使用的是VideoWriter而不是弃用的avifile，addframe并且它在内存中而不是在磁盘上进行渲染，因此速度相当快。