Bypass Calibre conversion pipeline for files other than KFX

Calm6315 · 06-13-2024, 09:55 PM

Basically I am looking for what the KFX input plugin does but for other formats too.
https://www.mobileread.com/forums/sh...d.php?t=291290

I have a lot of fixed layout books I'd like to convert to epub, but my kindle for pc only download .azw files and I can't use the gui nor debug-cli on these files.
they show up as azw3 when imported into calibre.

Is there plugin I can use to bypass the Calibre conversion pipeline for azw3 files?

DNSB · 06-13-2024, 10:21 PM

For what it may be worth, most the Kindle for Whatever releases only download as one file extension regardless of the actual format. K4PC downloads as azw and depends on introspecting the file to see if it is mobi, azw3 or KFX. K4Android downloads as prc, etc. calibre is not converting the file when it is being imported but rather changing the file extension to match the file's internals.

If you are using a recent K4PC, it's likely to be downloading mostly KFX files so you would need the newer DeDRM and the KFXInput plugins. Easy way to tell if it is a .KFX is to look at the directory the ebook was downloaded in. If you see an amzn1.drm-voucher.v1.<...>.voucher file, it is a KFX.

If calibre is importing the files as .azw3, you could try using the KindleUnpack plugin to extract an ebup or unpack the entire file.

jhowell · 06-13-2024, 10:29 PM

KF8 aka AZW3 files can be converted directly to EPUB bypassing the calibre conversion pipeline by using the KindleUnpack plugin. The results are very true to the original format.

Calm6315 · 06-13-2024, 10:59 PM

Thank you!!
This is exactly what I was looking for.

06-13-2024, 09:55 PM	#1
Calm6315 Junior Member Posts: 3 Karma: 10 Join Date: Jun 2024 Device: tablet	Bypass Calibre conversion pipeline for files other than KFX Basically I am looking for what the KFX input plugin does but for other formats too. https://www.mobileread.com/forums/sh...d.php?t=291290 I have a lot of fixed layout books I'd like to convert to epub, but my kindle for pc only download .azw files and I can't use the gui nor debug-cli on these files. they show up as azw3 when imported into calibre. Is there plugin I can use to bypass the Calibre conversion pipeline for azw3 files?

06-13-2024, 10:29 PM	#3
jhowell Grand Sorcerer Posts: 6,753 Karma: 86500093 Join Date: Nov 2011 Location: Charlottesville, VA Device: Kindles	KF8 aka AZW3 files can be converted directly to EPUB bypassing the calibre conversion pipeline by using the KindleUnpack plugin. The results are very true to the original format. Last edited by jhowell; 06-13-2024 at 10:32 PM.

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06-13-2024, 10:21 PM	#2
DNSB Bibliophagist Posts: 40,588 Karma: 157444382 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	For what it may be worth, most the Kindle for Whatever releases only download as one file extension regardless of the actual format. K4PC downloads as azw and depends on introspecting the file to see if it is mobi, azw3 or KFX. K4Android downloads as prc, etc. calibre is not converting the file when it is being imported but rather changing the file extension to match the file's internals. If you are using a recent K4PC, it's likely to be downloading mostly KFX files so you would need the newer DeDRM and the KFXInput plugins. Easy way to tell if it is a .KFX is to look at the directory the ebook was downloaded in. If you see an amzn1.drm-voucher.v1.<...>.voucher file, it is a KFX. If calibre is importing the files as .azw3, you could try using the KindleUnpack plugin to extract an ebup or unpack the entire file.

06-13-2024, 10:59 PM	#4
Calm6315 Junior Member Posts: 3 Karma: 10 Join Date: Jun 2024 Device: tablet	Thank you!! This is exactly what I was looking for.