The Reading Vent & Rant Thread - Page 42

John F · 09-30-2022, 06:59 PM

Quote:

Originally Posted by Multics

I have to vent. DRM and Calibre and win-7 doesn't mix. I've only been able to download book from baen.com which doesn't use DRM.

Maybe try the stand alone DRM removal tools?

issybird · 09-30-2022, 07:05 PM

Quote:

Originally Posted by Multics

I have to vent. DRM and Calibre and win-7 doesn't mix.

Sure they do. Perhaps you should rollback to a version of calibre compatible with Windows 7?

Aleron Ives · 09-30-2022, 08:17 PM

Quote:

Originally Posted by John F

Maybe try the stand alone DRM removal tools?

Are you allowed to post a link to that? I wasn't aware that a non-Calibre option even existed.

I did get DeDRM to work under Windows 7, but I had to use DeDRM 6.8.1 in order for it to work in Calibre 3.4.8.

ZodWallop · 09-30-2022, 11:58 PM

Quote:

Originally Posted by Multics

I have to vent. DRM and Calibre and win-7 doesn't mix. I've only been able to download book from baen.com which doesn't use DRM.

I don't think DRM has really changed much, has it? If you download whatever version of Calibre runs on Windows 7 and the version of deDRM that works with it and K4PC 1.17 or older (or the other book downloading programs from Kobo, Adobe, etc.), won't everything still work?

Aleron Ives · 10-01-2022, 01:01 AM

Yes, I was able to decrypt an ADE EPUB on Windows 7. The only difference is that the decrypted e-book has the files stored in a different order compared to what you get when you decrypt using Calibre 6. The extracted contents of the ZIP archives are identical, but the ZIP files themselves are not. I don't know if that's the result of the different Calibre or the different DeDRM versions (or a combination of both).

DiapDealer · 10-01-2022, 09:18 AM

The storage order of the files in an epub+zip archive is irrelevant (the only exception being the mimetype file, which must be first).

theducks · 10-01-2022, 11:08 AM

MR host a tool that Unpacks and repacks EPUB, allowing (careful) modification

https://wiki.mobileread.com/wiki/Tweak_EPUB

John F · 10-01-2022, 11:13 AM

Quote:

Originally Posted by Aleron Ives

Are you allowed to post a link to that? I wasn't aware that a non-Calibre option even existed.

I did get DeDRM to work under Windows 7, but I had to use DeDRM 6.8.1 in order for it to work in Calibre 3.4.8.

Sorry, I don't have a link. I used to use a stand alone version, but many moons ago I switched to just importing into Calibre.

DeDRM 6.8.1 seems quite old, I'm guessing the stand alone tools are included in it.

Aleron Ives · 10-01-2022, 05:24 PM

Quote:

Originally Posted by DiapDealer

The storage order of the files in an epub+zip archive is irrelevant (the only exception being the mimetype file, which must be first).

I know that there is no functional difference; I'm just curious as to the cause. I would expect the decrypted EPUBs to be identical, regardless of the Calibre version. Since the files differ, that would suggest that Calibre is building a new EPUB after the decryption, rather than giving you the decrypted original file.

Quote:

Originally Posted by John F

DeDRM 6.8.1 seems quite old, I'm guessing the stand alone tools are included in it.

The DeDRM ZIP contains many Python scripts, but none of them appears to be used for decryption without Calibre.

JSWolf · 10-01-2022, 05:52 PM

Quote:

Originally Posted by Multics

I have to vent. DRM and Calibre and win-7 doesn't mix. I've only been able to download book from baen.com which doesn't use DRM.

Tor eBooks are DRM free. Star Trek eBooks are DRM free.''

Is your computer able to run Windows 10? If so, you can upgrade to Windows 10, Calibre 6, and DeDRM 10.0.3 all for free.

Multics · 10-01-2022, 10:02 PM

I will have dual boot windows 7 and windows 10 once my upgrade arrives. I'm using Calibre 4.23 under win 7. Then I'll see if win 7 calibre and win 10 latest calibre can read the same files. I'll search for DeDRM 6.8.1. Now I'm going to bed.

Quoth · 10-02-2022, 06:10 AM

Quote:

Originally Posted by JSWolf

Is your computer able to run Windows 10? If so, you can upgrade to Windows 10, Calibre 6, and DeDRM 10.0.3 all for free.

You keep writing this opinion as fact. But Microsoft admits not all Win7 are entitled to free Win10 upgrade. Also some HW isn't suitable at all or poor.

DiapDealer · 10-02-2022, 08:23 AM

Quote:

Originally Posted by Aleron Ives

I know that there is no functional difference; I'm just curious as to the cause. I would expect the decrypted EPUBs to be identical, regardless of the Calibre version. Since the files differ, that would suggest that Calibre is building a new EPUB after the decryption, rather than giving you the decrypted original file.

Calibre itself is doing nothing to the epub after decryption. The 3rd-party On-Import DeDRM plugin does all of the modification. But it uses calibre's python and python modules to do so. So different Python versions and different python zip module versions between calibre versions are the more likely culprits. But as already stated, the storage order is of absolutely no consequence.

Aleron Ives · 10-02-2022, 07:03 PM

Indeed. I just like knowing why things happen the way they do.

ZodWallop · 10-03-2022, 12:08 AM

Quote:

Originally Posted by Quoth

You keep writing this opinion as fact. But Microsoft admits not all Win7 are entitled to free Win10 upgrade.

It's been a while since I checked, but you could still easily update Win 7 computers to 10 well beyond the 'free period' to do so. I did it with several old PCs.

Quote:

Also some HW isn't suitable at all or poor.

To be fair, he did say: "Is your computer able to run Windows 10?"

10-01-2022, 09:18 AM	#621
DiapDealer Grand Sorcerer Posts: 28,604 Karma: 204624552 Join Date: Jan 2010 Device: Nexus 7, Kindle Fire HD	The storage order of the files in an epub+zip archive is irrelevant (the only exception being the mimetype file, which must be first). Last edited by DiapDealer; 10-01-2022 at 09:21 AM.

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10-01-2022, 01:01 AM	#620
Aleron Ives Wizard Posts: 1,689 Karma: 16307824 Join Date: Sep 2022 Device: Kobo Libra 2	Yes, I was able to decrypt an ADE EPUB on Windows 7. The only difference is that the decrypted e-book has the files stored in a different order compared to what you get when you decrypt using Calibre 6. The extracted contents of the ZIP archives are identical, but the ZIP files themselves are not. I don't know if that's the result of the different Calibre or the different DeDRM versions (or a combination of both).

10-01-2022, 11:08 AM	#622
theducks Well trained by Cats Posts: 31,079 Karma: 60358908 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	MR host a tool that Unpacks and repacks EPUB, allowing (careful) modification https://wiki.mobileread.com/wiki/Tweak_EPUB

10-01-2022, 10:02 PM	#626
Multics Enthusiast Posts: 28 Karma: 9640 Join Date: Feb 2012 Device: SONY PRS-T1	I will have dual boot windows 7 and windows 10 once my upgrade arrives. I'm using Calibre 4.23 under win 7. Then I'll see if win 7 calibre and win 10 latest calibre can read the same files. I'll search for DeDRM 6.8.1. Now I'm going to bed.

10-02-2022, 07:03 PM	#629
Aleron Ives Wizard Posts: 1,689 Karma: 16307824 Join Date: Sep 2022 Device: Kobo Libra 2	Indeed. I just like knowing why things happen the way they do.

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