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theducks · 05-24-2019, 09:57 AM

Preferences Behavior has an INPUT FORMAT list. The order biases the conversion choice. (except for the Original_*)

As for using Original_*, that is as designed
BUT
there is a (preferences: tweaks

Code:

ID: save_original_format

When calibre does a conversion from the same format to the same format, for example, from EPUB to EPUB, the original file is saved, so that in case the conversion is poor, you can tweak the settings and run it again. By setting this to False you can prevent calibre from saving the original file. Similarly, by setting save_original_format_when_polishing to False you can prevent calibre from saving the original file when polishing.

I turned it OFF. I also gave up doing same format conversions in 99.9% of the cases. I find it faster-easier to edit EPUB or AZW3 stylesheets by hand while looking at the code than trial-error conversion of the same format (A clean EPUB/AZW3 usually converts to other formats just fine for my use)

05-24-2019, 09:57 AM	#2
theducks Well trained by Cats Posts: 31,094 Karma: 60358908 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Preferences Behavior has an INPUT FORMAT list. The order biases the conversion choice. (except for the Original_) As for using Original_, that is as designed BUT there is a (preferences: tweaks Code: ID: save_original_format When calibre does a conversion from the same format to the same format, for example, from EPUB to EPUB, the original file is saved, so that in case the conversion is poor, you can tweak the settings and run it again. By setting this to False you can prevent calibre from saving the original file. Similarly, by setting save_original_format_when_polishing to False you can prevent calibre from saving the original file when polishing. I turned it OFF. I also gave up doing same format conversions in 99.9% of the cases. I find it faster-easier to edit EPUB or AZW3 stylesheets by hand while looking at the code than trial-error conversion of the same format (A clean EPUB/AZW3 usually converts to other formats just fine for my use)