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why when export raw to jpeg somehow it decompress the file

New Here ,
Nov 11, 2020

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hi 

i shoot raw 60mb

when i excport to JPEG it drops it to 7mb 

this was not the issue before it started this week acting like this

i even rest all my setting on camera and my PS and still same issue

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Bug, Import and export, Mac

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why when export raw to jpeg somehow it decompress the file

New Here ,
Nov 11, 2020

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hi 

i shoot raw 60mb

when i excport to JPEG it drops it to 7mb 

this was not the issue before it started this week acting like this

i even rest all my setting on camera and my PS and still same issue

TOPICS
Bug, Import and export, Mac

Views

30

Likes

Translate

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Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Nov 11, 2020 1
D Fosse LATEST
Adobe Community Professional ,
Nov 11, 2020

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This is normal and the way it is. This is what jpeg compression does.

 

Jpeg uses very aggressive data compression to reduce file size on disk. When you reopen a jpeg, it is decompressed back to original size. But not the original state - jpeg is a destructive file format and that destruction is irreversible and cumulative.

 

Jpeg compression is extremely effective and can shrink a file down to 1-5 % of original size. That's why the format is still around, despite the serious drawbacks.

 

If you want to see the real and native file size, save to PSD or TIFF.

 

A raw file, on the other hand, is also smaller than PSD/TIFF, but for entirely different reasons. It is not compressed, but since it is a single channel instead of three channels, that's already a third of the size. Bit depth also determines file size. A raw file is usually 14 bits, so smaller than a 16 bit grayscale file.

 

In short - there is absolutely nothing wrong here and no problem to "fix".

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