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AcidWeb · 11-05-2013, 11:33 AM

Ladies and Gentlemen,

I left my warm lair at Kindle subforum and come here to ask for help.
I need to achieve some specific MOBI modifications and my level of Python-Fu prevents me to write it myself.

I have 500mb MOBI files created by KindleGen (Hybrid M7/KF8 headers) and I need:

Remove Source header. To decrease file size ~50%.
Change header field 501 to EBOK. To remove that ugly Personal tag on Kindle Paperwhite.

Currently I achieve both goals with modified KindleUnpack. It works correctly - KindleUnpack is awesome but it is way to slow with so big files. KindleStrip remove Source header much faster... but then I need to modify headers and I can't. All metadata editors I found fail due the fact they edit only first (M7) headers. KF8 headers are untouched.

I would be very gratefully for some Python snippets to edit that field 501 in both headers. Something slimer than parsing entire file like KindleUnpack. I need a scalpel and KindleUnpack is hammer :-) Patch to KindleStrip that set field 501 in both headers would be perfect.

Free candy to anybody who can help me.

11-05-2013, 11:33 AM	#1
AcidWeb KCC Co-Author Posts: 845 Karma: 765434 Join Date: Mar 2013 Location: Poland Device: Kindle Oasis 2	Help with modifying MOBI file Ladies and Gentlemen, I left my warm lair at Kindle subforum and come here to ask for help. I need to achieve some specific MOBI modifications and my level of Python-Fu prevents me to write it myself. I have 500mb MOBI files created by KindleGen (Hybrid M7/KF8 headers) and I need: Remove Source header. To decrease file size ~50%. Change header field 501 to EBOK. To remove that ugly Personal tag on Kindle Paperwhite. Currently I achieve both goals with modified KindleUnpack. It works correctly - KindleUnpack is awesome but it is way to slow with so big files. KindleStrip remove Source header much faster... but then I need to modify headers and I can't. All metadata editors I found fail due the fact they edit only first (M7) headers. KF8 headers are untouched. I would be very gratefully for some Python snippets to edit that field 501 in both headers. Something slimer than parsing entire file like KindleUnpack. I need a scalpel and KindleUnpack is hammer :-) Patch to KindleStrip that set field 501 in both headers would be perfect. Free candy to anybody who can help me. Last edited by AcidWeb; 11-05-2013 at 01:19 PM.