How to create one .avi-video from a folder with i.png files?

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Hi, I have a folder with 20000 .png files named 1.png, 2.png, and so on until 20000. I would like to make a .avi-video of it. The size of the entire folder is about 90MB. I read the documentation about the video writer but it did not address this specific problem.
I wonder if someone could help or suggest me which commands to load and and make the .png to a video file.
I thank you in advance for your help

Accepted Answer

Walter Roberson
Walter Roberson on 1 Dec 2012
writerObj = VideoWriter('YourAVI.avi');
for K = 1 : 20000
filename = sprintf('%d.png', K);
thisimage = imread(filename);
writeVideo(writerObj, thisimage);
Walter Roberson
Walter Roberson on 16 Aug 2021
Parts of the video may be written as you go, but there are internal buffers, so you should not rely upon frames being written as soon as you do the writeVideo() call. However, any buffered frames will be finalized and written when you close() the object.
Make sure that the name you gave in the VideoWriter() is the name of a file (with directory preferred) that you have write access to.

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