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Old 05-26-2014, 07:01 AM   #1
Francois Driesen
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Calibre - Remove unnneeded formats
In my Calibre Library there are many different formats (mobi, PDF, Lit, etc) which I converted to Epub. Is there a way in Calibre to globally remove unneeded formats?

I thought I'd be able to do a search in Windows Explorer but that doesn't work with the Calibre Library.

TIA.
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Old 05-26-2014, 07:22 AM   #2
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Please take the time to go over our site and post responsibly.

The General Discussion Forum is for "...discussions about e-book reading not specific to a device, software or format."

Your post has been moved out of the General Discussion Forum and moved into.....yes, the calibre forum.


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Old 05-26-2014, 07:30 AM   #3
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Open Calibre, select the books you want to remove the formats from.

On the remove books button click on the right hand side and select Remove files of a specific format from selected books or Remove all Formats from selected books except.
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Old 05-26-2014, 07:51 AM   #4
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Quote:
Originally Posted by Francois Driesen View Post
In my Calibre Library there are many different formats (mobi, PDF, Lit, etc) which I converted to Epub. Is there a way in Calibre to globally remove unneeded formats?
Search for 'formats:epub and formats:#>1' (without the quotes of course).

This will find all books with more than 1 format of which one format is epub. Select them all -> rightclick -> Delete All Formats except... -> select epub.

Done.
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Old 05-28-2014, 05:08 AM   #5
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I entered the search info, selected them all but rightclicking does not offer the option "Delete all formats except ..." I use Calibre version 1.38.
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Old 05-28-2014, 05:59 AM   #6
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Francois,
Just a suggestion. Before deleting the unwanted formats, make absolutely sure that your conversions are acceptable, word for word, paragraph for paragraph, chapter for chapter.

Sometimes the ebook source file is such a mess that calibre doesn't produce perfect results. I'm not trying to slight calibre, just recognizing that the GIGO (garbage in, garbage out) rule applies here. Unfortunately you might only notice less than perfect results after you have deleted the original ebook source. Leaving your only option to manually edit the ebook. That's a lot of work and it might introduce new errors.

If you have the HDD space, or lots of DVDs available, keep a copy of the entire library as it exists now - including the original, unwanted ebook formats. It never hurts to have a back-up.
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Old 05-28-2014, 07:29 AM   #7
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Quote:
Originally Posted by Francois Driesen View Post
I entered the search info, selected them all but rightclicking does not offer the option "Delete all formats except ..." I use Calibre version 1.38.
The option is actually called "Remove all formats from selected books, except..." and is under the submenu "Remove Books" (see http://manual.calibre-ebook.com/gui.html#remove-books).
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Old 05-30-2014, 04:32 AM   #8
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I found it. Thanks mbovenka.
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