convert jpg file to animation problem

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Yu Li 2018-8-1

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https://ww2.mathworks.cn/matlabcentral/answers/413102-convert-jpg-file-to-animation-problem

评论： Dinesh Iyer 2018-8-3

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Hi:

I tried to convert a series of jpg files to a movie. but the created .avi file could not be open.

I attached the sample code and test file, could someone give me some suggestions?

    clear all
    clc
    load test_name
    v = VideoWriter('test.avi');
    open(v);
    for ii = 1:length(test_name)
        fprintf('operating on file: %s.\n',test_name{ii})   
        F=imread(test_name{ii});
        writeVideo(v,F)
    end
    close(v);

by the way, the test code I attached operate the file one by one. assuming that I have 1000 frames, is there anyway to optimize it to parallel computing?

Thanks! Yu

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Dinesh Iyer 2018-8-3

In your animation since the images have to be written to video in a specific order, parallelization will not really help as you still have to wait for the nth image to be read and written until the (n+1)th frame is written. I believe VideoWriter has made some performance improvements in 18a as per the release notes. Maybe this should help speed up yyour operation.

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