Other Problem with VideoWriter and zbuffer renderer

Hello,

I just read the post http://www.mathworks.de/matlabcentral/answers/19731-videowriter-trouble-creating-the-example-peaks-avi, which helped me avoiding the faded, distorted always the first frame video.

But my sphere (surf) does then forget about the FaceAlpha 0.1 and plots a colormap onto the sphere.

My code is as follows:

vidobj = VideoWriter(moviename,'Motion JPEG AVI');
vidobj.FrameRate = 24;
open(vidobj);
for timeIdx = from_step_to
 plot_Orbit(...);
 set(gcf,'renderer','zbuffer');
 F = getframe(gcf);
 writeVideo(vidobj,F);
 clf;
end

and

plot_Orbit(...) contains
 ...
    %--- mesh visualization of Earth ----------
    [X Y Z] = sphere(20);
    X = X * r_earth;
    Y = Y * r_earth;
    Z = Z * r_earth;
    hold on;
    surf(X,Y,Z,'FaceAlpha',0.1);

which is neglected with the zBuffer renderer, but not with the OpenGL renderer, which on the other hand does not create a working video.

thx for any advice.

Answer 1

[Titus Edelhofer]

Hi,

yes, OpenGL is the only renderer capable of transparency. I tried your example and it works fine for me (using OpenGL instead of zbuffer). You might try to use the software driver instead of hardware driver:

opengl software

will use a generic software driver. It's of course not using hardware acceleration but quite often shows less problems then hardware drivers.

Titus

[Paul]

thanks a lot, just as you said !

have a nice day,

Paul