problem with videoWriter not closing

Question

Teshan Rezel 2022-3-14

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链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1671229-problem-with-videowriter-not-closing

评论： Teshan Rezel 2022-3-25

采纳的回答： yanqi liu

在 MATLAB Online 中打开

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);

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Jan 2022-3-24

@Teshan Rezel: Do not remove this question. Simply ask your new question and insert a link to this thread to avoid confusions. You can add a linl to the new question here also. Then everything is fine.

Teshan Rezel 2022-3-25

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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Answer 1

yanqi liu 2022-3-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1671229-problem-with-videowriter-not-closing#answer_917784

在 MATLAB Online 中打开

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);

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Teshan Rezel 2022-3-17

@yanqi liu hi, thank you for this but it doesn't seem to solve the issue just yet!

Rik 2022-3-23

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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