MATLAB: Making a movie from images in matlab

Question

Hey, I found this code from a link given by image analyst. It is perfect for want but i don't why this error is coming up………..

here is the code:

% Make an avi movie from a collection of PNG images in a folder.
% Specify the folder.
clear all; clc;
MATLAB = '/home/user/Documents/Tunde/MATLAB';
if ~isdir(MATLAB)
    errorMessage = sprintf('Error: The following folder does not exist:\n%s', myFolder);
    uiwait(warndlg(errorMessage));
    return;
end
% Get a directory listing.
filePattern = fullfile(MATLAB, '*.png');
pngFiles = dir(filePattern);
% Open the video writer object.
writerObj = VideoWriter('YourAVI.avi');
% Go through image by image writing it out to the AVI file.
for frameNumber = 1 : length(pngFiles)
    % Construct the full filename.
    baseFileName = pngFiles(frameNumber).name;
    fullFileName = fullfile(MATLAB, baseFileName);
    % Display image name in the command window.
    fprintf(1, 'Now reading %s\n', fullFileName);
    % Display image in an axes control.
    thisimage = imread(fullFileName);
     imshow(thisimage);  % Display image.
    drawnow; % Force display to update immediately.
    % Write this frame out to the AVI file.
    writeVideo(writerObj, thisimage);
end
% Close down the video writer object to finish the file.
close(writerObj);

and here is the comment:

Now reading /home/user/Documents/Tunde/MATLAB/Fitting (2).png
??? Error using ==> VideoWriter.VideoWriter>VideoWriter.writeVideo at 319
OBJ must be open before writing video.  Call open(obj) before calling writeVideo.
Error in ==> movieeed at 28
    writeVideo(writerObj, thisimage);

Answer 1

Please make sure your code is formatted correctly. It is barely readable.

Anyways, you didn't actually open the video writer object in your code. The line

writerObj = VideoWriter('YourAVI.avi');

Should be followed by:

open(writerObj);