Register Guidelines E-Books Search Today's Posts Mark Forums Read

Go Back   MobileRead Forums > E-Book Software > Calibre > Plugins

Notices

Reply
 
Thread Tools Search this Thread
Old 10-28-2024, 11:44 AM   #766
yoshi
Member
yoshi began at the beginning.
 
Posts: 10
Karma: 10
Join Date: Aug 2024
Location: Japan
Device: Kindle Voyage & Kindle for PC
I read the limitation mentioned in the first message of this thread:

> Limitations:
> The KFX format is undocumented and has changed over time. Books containing new or unknown features may fail to convert or result in incorrect content or formatting.

I appreciate that the creator of the KFX input plugin is updating it to address these issues.

I have a question: Will the latest version cover all the previous KFX files which could be converted in the past? If not, should I convert a KFX file as soon as the plugin can handle it?
yoshi is offline   Reply With Quote
Old 10-28-2024, 12:00 PM   #767
jhowell
Grand Sorcerer
jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.
 
jhowell's Avatar
 
Posts: 6,733
Karma: 86234863
Join Date: Nov 2011
Location: Charlottesville, VA
Device: Kindles
Quote:
Originally Posted by yoshi View Post
I have a question: Will the latest version cover all the previous KFX files which could be converted in the past?
I attempt to maintain compatibility with older versions of KFX. It is possible that I could make a mistake but if so I will correct the problem once it is reported.

Quote:
Originally Posted by yoshi View Post
If not, should I convert a KFX file as soon as the plugin can handle it?
I personally would remove DRM and convert files as I acquire them, just in case.
jhowell is offline   Reply With Quote
Old 10-29-2024, 11:55 PM   #768
yoshi
Member
yoshi began at the beginning.
 
Posts: 10
Karma: 10
Join Date: Aug 2024
Location: Japan
Device: Kindle Voyage & Kindle for PC
I got the AZW3 (Download & transfer via USB) and KFX (Kindle for PC 2.4.0) versions of "Quiz Game Book: Trivia Questions With Answers" from Amazon Japan and converted them to EPUB using "KindleUnpack" and "From KFX". The JPEGs of the cover page differ significantly:

[AZW3]
File size: 122,376 bytes
Image size: 1439 x 2290 pixels
JPEG compression: Quality 40
Number of colors: 41,390

[KFX]
File size: 297,173 bytes
Image size: 1207 x 1920 pixels
JPEG compression: Quality 100
Number of colors: 9,992

The picture quality from the AZW3 file looks better than from the KFX file. Is it possible to restore the original JPEGs?

Otherwise, is it possible to reduce the JPEG compression quality to reduce the file size? The file size becomes less than half if 100% is changed to 85%.
yoshi is offline   Reply With Quote
Old 10-30-2024, 12:05 PM   #769
jhowell
Grand Sorcerer
jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.
 
jhowell's Avatar
 
Posts: 6,733
Karma: 86234863
Join Date: Nov 2011
Location: Charlottesville, VA
Device: Kindles
Quote:
Originally Posted by yoshi View Post
I got the AZW3 (Download & transfer via USB) and KFX (Kindle for PC 2.4.0) versions of "Quiz Game Book: Trivia Questions With Answers" from Amazon Japan and converted them to EPUB using "KindleUnpack" and "From KFX". The JPEGs of the cover page differ significantly:
Amazon uses different image sizes and compression levels for the same book when delivered in different formats or to different device classes.

The cover image file you get using From KFX is whatever is contained within the KFX file you converted.

Quote:
Originally Posted by yoshi View Post
The picture quality from the AZW3 file looks better than from the KFX file. Is it possible to restore the original JPEGs?
Not using this plugin.

You can change the cover image using calibre if you find one that you like better.

Quote:
Originally Posted by yoshi View Post
Otherwise, is it possible to reduce the JPEG compression quality to reduce the file size? The file size becomes less than half if 100% is changed to 85%.
If you want that done it is up to you to accomplish it using something other than this plugin.
jhowell is offline   Reply With Quote
Old 10-30-2024, 09:17 PM   #770
yoshi
Member
yoshi began at the beginning.
 
Posts: 10
Karma: 10
Join Date: Aug 2024
Location: Japan
Device: Kindle Voyage & Kindle for PC
Thank you for your reply.

It seems that the graphic files embedded in AZW3 and KFX formats can differ for the same book. Your plugin extracts the original files. Is my understanding correct?

I can edit EPUB files myself and will do so when necessary.
yoshi is offline   Reply With Quote
Old 10-30-2024, 10:38 PM   #771
jhowell
Grand Sorcerer
jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.
 
jhowell's Avatar
 
Posts: 6,733
Karma: 86234863
Join Date: Nov 2011
Location: Charlottesville, VA
Device: Kindles
Quote:
Originally Posted by yoshi View Post
It seems that the graphic files embedded in AZW3 and KFX formats can differ for the same book.
Yes, definitely. It can even differ for the same format delivered to different devices.

Quote:
Originally Posted by yoshi View Post
Your plugin extracts the original files. Is my understanding correct?
It extracts whatever was present in KFX format. That is likely different from the original files provided by the book publisher.
jhowell is offline   Reply With Quote
Old 11-01-2024, 02:28 AM   #772
yoshi
Member
yoshi began at the beginning.
 
Posts: 10
Karma: 10
Join Date: Aug 2024
Location: Japan
Device: Kindle Voyage & Kindle for PC
EBUB-based KFX files can be opened in Calibre, but PDF-based ones can't.
Is this an issue with Calibre?
yoshi is offline   Reply With Quote
Old 11-01-2024, 08:43 AM   #773
jhowell
Grand Sorcerer
jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.jhowell ought to be getting tired of karma fortunes by now.
 
jhowell's Avatar
 
Posts: 6,733
Karma: 86234863
Join Date: Nov 2011
Location: Charlottesville, VA
Device: Kindles
Quote:
Originally Posted by yoshi View Post
EBUB-based KFX files can be opened in Calibre, but PDF-based ones can't.
Is this an issue with Calibre?
By default the KFX Input plugin blocks conversion of print replica books to EPUB because the results are generally inferior to using From KFX to produce PDF. Because viewing in calibre requires conversion to EPUB that will not work for those books.
jhowell is offline   Reply With Quote
Old Yesterday, 06:30 PM   #774
JSWolf
Resident Curmudgeon
JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.JSWolf ought to be getting tired of karma fortunes by now.
 
JSWolf's Avatar
 
Posts: 76,329
Karma: 136006010
Join Date: Nov 2006
Location: Roslindale, Massachusetts
Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3
Quote:
Originally Posted by yoshi View Post
Thank you for your reply.

It seems that the graphic files embedded in AZW3 and KFX formats can differ for the same book. Your plugin extracts the original files. Is my understanding correct?

I can edit EPUB files myself and will do so when necessary.
You have to be very careful with graphics in an Amazon eBook. If you buy a graphics heavy eBook that's supposed to have hi-resolution graphics, you may not get them at the full size.

In another thread it was found out that Amazon was not delivering one of Brandon Sanderson's eBooks with the graphics in tact. The resolution was reduced.

So if you are wanting to buy a graphics heavy eBook from Amazon and it's also available to buy in ePub, buy the ePub as you will definitely get the graphics as they should be.

I don't know what you have to do to get the original graphics (And not the Amazon diddled graphics) from a Kindle eBook.
JSWolf is online now   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
[Conversion Input] Microsoft Doc Input Plugin igi Plugins 76 06-28-2019 05:47 AM
KFX conversion, transfer back to library issue. shoelesshunter Conversion 2 08-22-2017 07:40 PM
[Conversion Input] LaTeX Formulas Input Conversion Plugin sevyls Plugins 0 03-23-2015 06:52 AM
[Input Plugin] DOCX Input SauliusP. Plugins 42 06-05-2013 05:01 AM
Looking For MHT Input Conversion Plugin FlooseMan Dave Plugins 4 03-30-2010 06:52 PM


All times are GMT -4. The time now is 06:45 AM.


MobileRead.com is a privately owned, operated and funded community.