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?

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07-21-2018, 10:06 AM	#2
pdurrant The Grand Mouse 高貴的老鼠 Posts: 71,508 Karma: 306214458 Join Date: Jul 2007 Location: Norfolk, England Device: Kindle Voyage	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.

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