two files with different size

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Majid Al-Sirafi 2017-2-12

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/324630-two-files-with-different-size

评论： Majid Al-Sirafi 2017-2-13

采纳的回答： Walter Roberson

c_c.m

hi every one the attached matlab code is used for create a new file from input file. unfrtunatelly, the size of the

output file is different from the input. so, how to make them with the same size

regard,

Majid

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Answer 1

Walter Roberson 2017-2-13

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c_c.m

Enhanced code is attached. I upgraded it to use VideoReader and VideoWriter as the routines you used are no longer available in MATLAB.

This turns on Motion JPEG AVI compression. If you want uncompressed changed to 'Uncompressed AVI' in the line marked.

Uncompressed AVI is expected to be larger than the original AVI as the original is likely compressed. Motion JPEG might be smaller than the original AVI: with one or more channels zeroed out, there is less change in the data and that means it can be compressed more efficiently.

Check out the code... I made some improvements.

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Walter Roberson 2017-2-13

I marked a line in the code. Change the line to use 'Uncompressed AVI' instead of 'Motion JPEG AVI'.

Majid Al-Sirafi 2017-2-13

thank you dear Walter Roberson, please keep us in contact. I need your supporting

Majid

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Answer 2

Jan 2017-2-12

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https://ww2.mathworks.cn/matlabcentral/answers/324630-two-files-with-different-size#answer_254477

If the original file is compressed, it is the expected result, that saving it as uncompressed AVI file changes the file size. Could you provide more details about what you get and what you want?

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Majid Al-Sirafi 2017-2-13

actually, I want to produce file from another. for example, I have file with size 359 MB but after running the code, the size of the output file is 1.64 MB. pleaes, i need your e-mail in order to send the input and output files to you

Majid

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