Quote:
Originally Posted by kovidgoyal
I think the size you are referring to is the number of extra bytes in section 0 after the end of EXTH header? because the length of a calibre produces section 0 is always atleast 2452 bytes
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Hi Kovid,
Yes this is extra size in section 0 after the EXTH header. However my version of calibre did not allocate 2452 bytes at all. Is that new in 0.7.55?
I privately emailed you the test2.mobi file created via Calibre since the book I randomly chose was a commercial ebook (and therefore should not be posted in the forum).
To be specific, to create that test2.mobi I used Calibre on a Mac (0.7.54) to import a non-drm .epub file. I then converted it to .mobi via Calibre (using the default settings only) and then used the "Save to Disk" to save the .mobi and .epub to my hard drive where I copied the resulting .mobi out and renamed it to test2.mobi which I sent to you.
Either way, the KindleGen version of the book has a size of over 8668 bytes for the total size of the section 0. This allows them to pretty much extend/change the exth section in any way they want without having to change any of the other records in the pdb format.
If you want the KindleGen version, please let me know and I will e-mail it to you (it is twice the size).
Thanks,
KevinH