How to make one video out of 3 images?

Question

Teshan Rezel 2022-3-13

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1670684-how-to-make-one-video-out-of-3-images

评论： Teshan Rezel 2022-3-14

Hi folks,

I'm trying to create a single image out of 3 different images, then collate the subsequent images into a video. I'm also trying to write some text onto the middle of the 3 images, that changes with each subsequent frame. I have made the following start but am having limited luck getting it to work!

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)) '$^{o}C$'];
RGB = insertText(h, [50 50], myText, 'FontSize',18,'BoxColor', 'black','BoxOpacity',1,'TextColor','white');
image(RGB, 'Parent', axes);
axes.Visible = 'off';
writeVideo(writerObj, RGB);

this is placed inside a loop for j. I close the writerObj when the loop ends.

I'm sure my syntax is wrong so I'd appreciate any advice on how to fix it!

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Answer 1

Image Analyst 2022-3-13

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1670684-how-to-make-one-video-out-of-3-images#answer_916509

ExtractMovieFrames.m

See attached example. See the second half where I create a movie from images in a folder. The first half deals with extracting frames from an existing movie, getting the mean colors, and (optionally) saving the individual frames to disk.

With only 3 images, you'll need to adjust your FrameRate to be something like 1 or 2 seconds.