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Old 08-23-2017, 03:43 AM   #1
nemu
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Question Mass Removal of JPEG while keeping PNG?

How to remove all JPG but keep PNG of a EPUB? Maybe there is a way to access the EBUP folder to mass delete the JPG files?

Additional Info
- I am able to manually remove the JPG, I just would like to do it faster.
- File is an DRM-free EPUB
- I am using calibre 3.6 on OS X 10.11 El Capitan
- The PNG contain useful diagramms while the JPG contain additional fotos, which I don’t need and just use a lot of space. I am already using caliber’s image compression feature.

I haven’t found this specific topic in the documentation nor in previous posts, but if I have missed it please link to it. Thank you for the mobileread and Calibe communities. They add a lot of value to my life.
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Old 08-23-2017, 04:29 AM   #2
kovidgoyal
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Use the unpack book tool in calibre which will give you a folder on your filesystem witht he files from the epub. Use whtever tools you want to delete the jpegs, then rebuild.
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Old 08-23-2017, 05:06 AM   #3
nemu
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Thumbs up It worked! Details bewlow

Thanks Kovid, it worked!

Below the detailed how to for my self and others in the future:
1. Optional: Move all images into one folder
Edit Book => Tools - Arrange into folders

2. Press "U" to start unpack tool
Explode book, go into "images", sort by kind, deleted unwanted files, Rebuild book
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