Making video from an animation

I am plotting few graphs and trying to make movie out of it. The code runs without error. But unfortunately the video is not saved. Can anyone help me on this?

a = smoothed_final_plot_mat(:,3:end);
np = (size(a,2)-1)/2;        % number of particles
t = a(2:end,1);
arena_image = imread('arena_pic.png');
h1 = axes ;
image('XData',[0 6890],'YData',[0 5000],'CData',arena_image) ; % set your limits
set(h1,'YDir','normal');
hold on
ax = gca;
ax.YDir = 'reverse';
axis([0 6890 0 5000])
h = zeros(1,np);   % ants handles
hold on
writerObj = VideoWriter('output3.avi'); % Name it.
writerObj.FrameRate = 60; % How many frames per second.
open(writerObj); 
for ii = 2:25:size(a,1)         % frames
    k = 0;
    t = a(ii,1);                  % time of current frame
    str = sprintf('Time in seconds = %f', t);
    title(str)
    label = cellstr(num2str(unique(a(1,2:end))'));
    hold on
    for jj = 2:2:np*2             % ant handles
        x = a(ii,jj);
        y = a(ii,jj+1);
        k = k + 1;
        h(k) = plot(x,y,'--or');
        hi(k) = text(x, y, label(k), 'VerticalAlignment','bottom', 'HorizontalAlignment','right');  %#ok<SAGROW>
        h2(k) = plot(a(max(1,ii-150):ii,jj), a(max(1,ii-150):ii,jj+1)); %#ok<SAGROW>
    end
    drawnow
    pause(0.00001)
    delete(h)
    delete(hi)
    delete(h2)
    hold off
end
frame = getframe(gcf); % 'gcf' can handle if you zoom in to take a movie.
writeVideo(writerObj, frame);
close(writerObj);

Answer 1

[KSSV]

YOur writevideo command is out side the loop..this should be inside the loop.

[Hari krishnan]

Thank you very much, it worked.