MATLAB: VideoWriter frame count problem

Question

Hi,

I am trying to create a movie from a bunch of PNG images (10 in number) that are stored in a folder. My code looks like this:

img_folder = 'Libraries\Documents\myImageFolder\';
img_format = '*.png';
images = dir(fullfile(img_folder,img_format));
for i = 1:10
   img = imread(images(i).name);
   imshow(imageFile);
   v = VideoWriter('test.avi');
   videoFile.FrameRate = 3;
   open(v)
    frames = getframe(gcf);
   writeVideo(v,frame);
end
close(v);

when I run the code, the figures show up and are refershed as the loop runs. The code ends with everything seemingly fine without any error. But when I run the video file test.avi, I only see the last frame and the movie abruptly ends. When I check the value of frame count from the workspace, it says frame count = 1. It should be 10 as there are 10 images and the for loop loops over 10 images. What am I doing wrong.

Help much appreciated.

Answer 1

The call to VideoWriter should be before the loop.