[Conversion Plugin] KFX Input

[jhowell]

Originally Posted by bustacap

works great now, thank you again! only difference in filesize is the cover for some reason (not saying theres something wrong, just an observation).
its the same size as the cover in the calibre library. do kfx files have a separate cover than the included pdf?

Cover pages handled as a special case in Kindle formats. In the Kindle publishing process the cover is added separately from the other content of the book.

In the comic example that we discussed previously the cover page image is a 470KB JPEG file with 1276x1920 resolution. All of the other page images in the book are separate PDF files, each containing a JPEG about 1MB in size with 1063x1599 resolution.

[bustacap]

Originally Posted by jhowell

Cover pages handled as a special case in Kindle formats. In the Kindle publishing process the cover is added separately from the other content of the book.

In the comic example that we discussed previously the cover page image is a 470KB JPEG file with 1276x1920 resolution. All of the other page images in the book are separate PDF files, each containing a JPEG about 1MB in size with 1063x1599 resolution.

thank you for the info

[Quoth]

Originally Posted by jhowell

Cover pages handled as a special case in Kindle formats. In the Kindle publishing process the cover is added separately from the other content of the book.

Actually all the ebook resellers and all the POD (paper prints) operators, I've ever seen, require separate cover and content uploads.

[jhowell]

Version 2.26.2 - 17 Aug 2025

Fix incompatibility with calibre versions older than 8.6.0 introduced in version 2.26.0 of this plugin.

Allow conversion to EPUB to complete (with errors) if the KFX book being converted is missing its cover image.

[koland]

Has something changed on Kindle, now getting kfx-zip files from Kindle for PC (2.4) and unable to dedrm the same books from a Kindle Keyboard (some files still work - everything seemed to work yesterday).

[koland]

Originally Posted by jhowell

Version 2.26.2 - 17 Aug 2025

Fix incompatibility with calibre versions older than 8.6.0 introduced in version 2.26.0 of this plugin.

Allow conversion to EPUB to complete (with errors) if the KFX book being converted is missing its cover image.

Anyone else having problems as of today (8/19) with books copied from a Kindle 50/50 not working with dedrm and the same books ending up in a KFX-ZIP format from Kindle for PC (2.4).

everything seemed to be working yesterday...

[jhowell]

Originally Posted by koland

Anyone else having problems as of today (8/19) with books copied from a Kindle 50/50 not working with dedrm and the same books ending up in a KFX-ZIP format from Kindle for PC (2.4).

everything seemed to be working yesterday...

Seeing KFX-ZIP format may indicate a DRM removal failure but it can also have other causes. The first thing to do is to examine a log produced when a book is first imported verify the actual cause of the problem. That can be done using calibre's debug mode.

If it is actually DRM related and you cannot find the cause then I suggest posting an Issue at the site where you obtained the DRM removal software.

If it is something other than DRM then post here again for further analysis.

[koland]

Originally Posted by jhowell

Seeing KFX-ZIP format may indicate a DRM removal failure but it can also have other causes. The first thing to do is to examine a log produced when a book is first imported verify the actual cause of the problem. That can be done using calibre's debug mode.

If it is actually DRM related and you cannot find the cause then I suggest posting an Issue at the site where you obtained the DRM removal software.

If it is something other than DRM then post here again for further analysis.

I will give it a try. But had not changed dedrm when this hit (I tried the alpha candidate after, with no change). I did update KFX, but believe it was after (as I didn't consider it until I hit the issue).

Calibre itself, though, was upgraded recently. Perhaps even after Monday evening (when everything worked).