Remove DRM from Azw4 is very slow

kazekiki · 07-21-2018, 09:53 AM

Recently I take long time to remove DRm from Azw4 file when adding it (I use DeDrm plugin) , it got likely half an hour for a 100mb file, while adding non-DRM azw4 file still fast as normal? so what can I do to fasten the process of remove DRM of azw4?

pdurrant · 07-21-2018, 10:06 AM

Check whether the decoding is being done by python native code, and if it is, re-write it as in C code and compile it into a library to be called from the python scripts.

Or just live with it. How many 100MB AZW4s do you have to decrypt, after all? It's a one-time hit.

kazekiki · 07-21-2018, 10:17 AM

Quote:

Originally Posted by pdurrant

Check whether the decoding is being done by python native code, and if it is, re-write it as in C code and compile it into a library to be called from the python scripts.

Or just live with it. How many 100MB AZW4s do you have to decrypt, after all? It's a one-time hit.

I'm not a coder so I can't rewrite it, I got many azw4s with size >100mb need descrypt, it take so long that why I post to find a solution. last year everything still ok, remove drm still fast, maybe amazon have change their azw4 structure so thr process of decoing geting so slow like that!

DoctorOhh · 07-21-2018, 12:14 PM

Quote:

Originally Posted by kazekiki

I'm not a coder so I can't rewrite it, I got many azw4s with size >100mb need descrypt, it take so long that why I post to find a solution. last year everything still ok, remove drm still fast, maybe amazon have change their azw4 structure so thr process of decoing geting so slow like that!

Might find better info if you asked on the site where you obtained the plugin.

pdurrant · 07-21-2018, 01:17 PM

Quote:

Originally Posted by DoctorOhh

Might find better info if you asked on the site where you obtained the plugin.

What I should have said! Thanks.

07-21-2018, 09:53 AM	#1
kazekiki Junior Member Posts: 2 Karma: 10 Join Date: Jul 2018 Device: kindle	Remove DRM from Azw4 is very slow Recently I take long time to remove DRm from Azw4 file when adding it (I use DeDrm plugin) , it got likely half an hour for a 100mb file, while adding non-DRM azw4 file still fast as normal? so what can I do to fasten the process of remove DRM of azw4?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Kobo touch: a "slow" book in turning pages and add/remove bookmarks.	geniaco	Kobo Reader	0	12-13-2017 05:20 AM
How to convert AZW4 to printable format (not a DRM issue)	mlevin77	Conversion	3	10-16-2014 08:00 AM
azw4 file with DRM	sasqwatch	General Discussions	1	08-17-2014 12:52 PM
Kindle Keyboard - Slow and Won't remove Deleted books	Tarana	Amazon Kindle	8	02-15-2014 09:09 AM

07-21-2018, 10:06 AM	#2
pdurrant The Grand Mouse 高貴的老鼠 Posts: 73,941 Karma: 315160596 Join Date: Jul 2007 Location: Norfolk, England Device: Kindle Oasis	Check whether the decoding is being done by python native code, and if it is, re-write it as in C code and compile it into a library to be called from the python scripts. Or just live with it. How many 100MB AZW4s do you have to decrypt, after all? It's a one-time hit.

Advert

Advert