movie2avi by MATLAB R2011a

Hi everybody,

I am using the following sample codes in the Mathworks to generate an avi movie by MATLAB R2011a on MAC OS X 10.6.7. However, there is nothing in the movie but blank when I open it either with QuickTime Player or Divx Player. Would any one please give me some suggestions? Thanks so much.

_|nFrames = 20;

% Preallocate movie structure. mov(1:nFrames) = struct('cdata', [],... 'colormap', []);

% Create movie. Z = peaks; surf(Z); axis tight set(gca,'nextplot','replacechildren'); for k = 1:nFrames surf(sin(2*pi*k/20)*Z,Z) mov(k) = getframe(gcf); end

% Create AVI file. movie2avi(mov, 'myPeaks.avi', 'compression', 'None');|__ITALIC TEXT_

Best, Qian

[Xin]

I have same issue with 2012a version of matlab

Answer 1

[Qianqian]

I can generate the movie in mpg formate by mpgwrite now, but still cannot solve the problem with Movie2Avi.

Answer 2

[Jorrit M]

I generally find it easier to use VideoWriter instead. It also allows you a more detailed control:

%create the object:
writerObj = VideoWriter([PathName FileName]);
  
%set properties:
writerObj.FrameRate = intFrameRate;
writerObj.Quality = intQuality;

%write movie
open(writerObj);
writeVideo(writerObj,mov);

% close the handle
close(writerObj);

[Qianqian]

Hi Jorrit,

Thanks for your attention. I just tried VideoWriter, but it has the same problem with Movie2Avi. The size of the movie is normal, but no images inside. I will use mpgwrite at this time, even though there aren't enough properties needed. Thanks anyway.

[Jorrit M]

Have you tried playing your movie with movie()? If that works, it's a problem with your avi-writer, otherwise there's something wrong with your image-to-frame assignment.

[amit pathania]

i tried both methods and I was able to record the video too.But,I was trying to make project on motion detection,in which I wanted to record the video whenever there is any motion.But Whenever I am trying to record the video freezes in GUI axis.Can you help me to increase the speed?