VideoWriter is only showing the last figure as opposed to full 135 image movie

1 次查看（过去 30 天）
james Brown
james Brown 2018-7-24
评论： james Brown 2018-7-24
Here is my code:
myFolder = 'C:\Users\Authorised User\Documents\MATLAB\OilDropForceImages\OilDropForceImagesResized'; if ~isdir(myFolder) errorMessage = sprintf('Error: The following folder does not exist:\n%s', myFolder); uiwait(warndlg(errorMessage)); return; end
filePattern = fullfile(myFolder, '*.png');
pngFiles = dir(filePattern);
for k = 1:length(pngFiles)
baseFileName = pngFiles(k).name;
fullFileName = fullfile(myFolder, baseFileName);
fprintf(1, 'Now reading %s\n', fullFileName);
imageArray = imread(fullFileName);
imshow(imageArray, 'InitialMagnification', 77);
% Display image.
drawnow; % Force display to update immediately.
end
A = imageArray;
hold on
vid0bj = VideoWriter('OilDropForceMovie','MPEG-4');
open(vid0bj);
writeVideo(vid0bj,A)
hold off
close(vid0bj)
This code plots in MATLAB the full video I want to see which lasts roughly 20 seconds but when I convert it to windows media player it is only showing the final image. What am i doing wrong?

请先登录，再回答此问题。

采纳的回答

Giridharan Kumaravelu
You are writing the video outside of the loop, that is why you are seeing only the last image. Move the writeVideo command inside the loop, you will find the full plot video getting saved.
Hope this helps!
  1 个评论
james Brown
james Brown 2018-7-24
Thanks that makes a lot of sense. haha problem now is that permission is being denied to create the mp4 file but I'll try and sort this problem myself

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Audio and Video Data 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by