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Old 05-12-2017, 02:25 AM   #121
DoctorOhh
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Quote:
Originally Posted by richard.presser View Post
The above scenarios are well and good for old eBooks; however, new ones appear to require the KFX format. Are there plans to support the KFX format in Calibre? This seems to me to be the long term solution.
Calibre doesn't support any DRMed book. You can ask over on Apprentice Alf's blog to see if there is any headway in deciphering the new format / DRM. That is where the current DeDRM plugin was hatched.
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Old 05-12-2017, 09:09 AM   #122
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Quote:
Originally Posted by richard.presser View Post
The above scenarios are well and good for old eBooks; however, new ones appear to require the KFX format.
I know of no books that require KFX format. There are some, such as the Kindle in Motion titles, that have enhanced features when delivered in KFX format. But as far as I know all of these books are delivered in the older formats to devices and apps that do not support KFX.

If you know anything different, I would be interested to hear about it.

Quote:
Originally Posted by richard.presser View Post
Are there plans to support the KFX format in Calibre? This seems to me to be the long term solution.
Unfortunately it isn't something that can be done at this time. The main problem is that all books in KFX format delivered by Amazon have DRM and no solution to remove that DRM currently exists. There is an open issue on Apprentice Harper's github regarding this. Without this, the ability to convert from KFX to other e-book format would be useless.

I have looked into the possibility of converting from KFX should DRM removal eventually become available. I have come to the conclusion that while this is possible it would be a fairly large amount of work to implement since KFX is highly processed from the original format. In the end the result would not be as true to the original format as can be obtained by converting from KF8/AZW3, which can already be done with no additional development needed.
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Old 05-14-2017, 03:10 AM   #123
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Thank you!

Method 2 - Disable KFX support in Kindle for PC/Mac

I used method 2 on my windows 10 laptop. It worked perfectly! Thank you!!!
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Old 05-14-2017, 10:39 PM   #124
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Quote:
Originally Posted by amc View Post
Method 2 - Disable KFX support in Kindle for PC/Mac

I used method 2 on my windows 10 laptop. It worked perfectly! Thank you!!!
I am running
ren %localappdata%\Amazon\Kindle\application\renderer-test.exe renderer-test.xxx

and got error
"A duplicate file name exists, or the file
cannot be found."

could you tell me exactly command and under which folder you run it?

Thanks in advance
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Old 05-15-2017, 06:48 PM   #125
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The command just changes the extension of renderer-test.exe to .xxx. Copy %localappdata%\Amazon\Kindle\application\ into the File Explorer address bar and take a look.
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Old 05-19-2017, 01:09 AM   #126
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Yes, I may have misunderstood the issue. I have a workaround using my complex set-up, which sees Windows 10 running under VMWare Fusion on an MBP. I have the latest Kindle version on Windows, which enables the new or reactivated ability to copy text from within Kindle and an old version under MacOS that gives me the old format that I copy across to Windows that will load into Calibre. Not a solution for everyone, but it's working for me, at least until KFX is imposed everywhere... I appreciate the feedback.
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Old 05-19-2017, 08:15 AM   #127
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Quote:
Originally Posted by jhowell View Post
The main problem is that all books in KFX format delivered by Amazon have DRM and no solution to remove that DRM currently exists.
Is it DRM, or just an obfuscated format for which translators have not yet been written?
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Old 05-19-2017, 08:47 AM   #128
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Quote:
Originally Posted by jcsalomon View Post
Is it DRM, or just an obfuscated format for which translators have not yet been written?
It's DRM, but using a fixed key known to all Kindle devices that support KFX.

There's also a format translation issue, but the first step would be for someone to reverse-engineer the DRM, to produce an unencrypted version for the new format.
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Old 05-19-2017, 07:47 PM   #129
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Quote:
Originally Posted by pdurrant View Post
It's DRM, but using a fixed key known to all Kindle devices that support KFX.
Books that are marked "Simultaneous Device Usage: Unlimited" appear to all use the same decryption key. Books that do not have that designation cannot be transferred between devices in KFX format and may possibly have different encryption keys. There is currently no way to be sure.
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Old Yesterday, 03:51 PM   #130
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If I want to try Method 2, where do I put the command for PC, i.e., in C:\ or somewhere else?
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Old Today, 12:32 AM   #131
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Originally Posted by HRR View Post
If I want to try Method 2, where do I put the command for PC, i.e., in C:\ or somewhere else?
Anywhere at the command prompt, C:/ is fine. It simply renames renderer-test.exe to renderer-test.xxx. You can do this via the file manager by finding that file and renaming it manually.
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