problem with videoWriter not closing

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Teshan Rezel
Teshan Rezel on 14 Mar 2022
Commented: Teshan Rezel on 25 Mar 2022
Hi folks,
I am creating a video and having trouble with the videoWriter not closing, or taking a very long time to close.
May I please ask how to fix this? The code is as follows:
writerObj = VideoWriter(mainVideoName);
writerObj.FrameRate = 10;
open(writerObj);
for j = 1 : numMainImages
mainImg = imread([imageMainFolder imageMainFiles(j).name]);
mainImg = mainImg(:,:,1:3);
cropImg = imread([cropsFolder cropFiles(j).name]);
threshImg = im2uint8(imread([threshFolder threshFiles(j).name]));
h = figure;
h(1) = subplot(2, 2, 1);
image(cropImg, "Parent", h(1));
h(2) = subplot(2, 2, 2);
image(threshImg, "Parent", h(2));
h(3) = subplot(2, 2, 3:4);
image(mainImg, "Parent", h(3));
myText = ['Temperature = ', num2str(myTemp(j)), '^{o}C'];
annotation('textbox', [0.4, 0.55, 0,0], 'string', myText, "FitBoxToText","on");
h(2).Colormap = gray(256);
for k = 1:3
h(k).XAxis.Visible = "off";
h(k).YAxis.Visible = 'off';
end
thisFrame = getframe(gca);
writeVideo(writerObj, thisFrame);
end
close(writerObj);
  5 Comments
Teshan Rezel
Teshan Rezel on 25 Mar 2022
hi @Image Analyst, thanks for the response! It appears it doesn't actually get to the close(writeObj) statement as I left the programme running over 2 days and had no video files written.
I'm not sure why this is!

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Answers (1)

yanqi liu
yanqi liu on 15 Mar 2022
yes,sir,may be use image replace frame to test,such as
writerObj = VideoWriter(mainVideoName);
writerObj.FrameRate = 10;
open(writerObj);
for j = 1 : numMainImages
mainImg = imread([imageMainFolder imageMainFiles(j).name]);
mainImg = mainImg(:,:,1:3);
cropImg = imread([cropsFolder cropFiles(j).name]);
threshImg = im2uint8(imread([threshFolder threshFiles(j).name]));
h = figure;
h(1) = subplot(2, 2, 1);
image(cropImg, "Parent", h(1));
h(2) = subplot(2, 2, 2);
image(threshImg, "Parent", h(2));
h(3) = subplot(2, 2, 3:4);
image(mainImg, "Parent", h(3));
myText = ['Temperature = ', num2str(myTemp(j)), '^{o}C'];
annotation('textbox', [0.4, 0.55, 0,0], 'string', myText, "FitBoxToText","on");
h(2).Colormap = gray(256);
for k = 1:3
h(k).XAxis.Visible = "off";
h(k).YAxis.Visible = 'off';
end
thisFrame = frame2im(getframe(gca));
writeVideo(writerObj, thisFrame);
end
close(writerObj);
  2 Comments
Rik
Rik on 23 Mar 2022
I haven't read the rest of the thread, but can you explain what is different between what you need and what this suggestion does? Yanqi might be able to help you if you make it clear what should be different.
In general users with sufficient reputation points to delete posts, are not fans of doing that for legitimate content.

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