movie2avi - I am getting a blank movie, but no errors.

When I make the movie, it plays fine while I'm running the code. When I run movie(M), it gives me a weird off-center axis and movie2avi(M,'somename.avi') is just a blank screen of the proper time.

Z = peaks;

surf(Z);

axis tight

hfig=figure; 

xlabel('x');

ylabel('y');

zlabel('z');

xlim([0 60]);

ylim([0 60]);

zlim([-10 10]);

M(1)=getframe(hfig);

for k = 2:200

    surf(cos(2*pi*k/50)*Z,Z)

    zlim([-10 10]);

    M(k) = getframe(hfig);
  end

Any help would be great. Thanks

Answer 1

[Walter Roberson]

You might need to add a pause() for a short time before the getframe. You are not supposed to need that, but in practice some people need it.

Also, before the first getframe() you should

hold all

and change your graphics code slightly. Easiest for me to show you:

Z = peaks;

hfig=figure; 

oldsurf = surf(Z);

axis tight

xlabel('x');

ylabel('y');

zlabel('z');

xlim([0 60]);

ylim([0 60]);

zlim([-10 10]);

hold all

pause(0.1)

M(1)=getframe(hfig);

for k = 2:200

    delete(oldsurf);

    oldsurf = surf(cos(2*pi*k/50)*Z,Z);

    pause(0.1)

    M(k) = getframe(hfig);
  end

hold off

Answer 2

[Matthew]

Thanks for the help but it's still giving me weird results.

I ran the correction and it still isn't giving me a movie. When I run movie(M) the movie is the axis with whatever is on my desktop behind the figure.

[Image Analyst]

All movies, or just one particular movie? Could you upload the movie somewhere?