MobileRead Forums - View Single Post - html2mobi (a mobigen replacement written in Perl)

igorsk · 11-26-2007, 08:53 PM

The "number of records" in palmdoc header (Word at 0x8) needs to be set to the number of records containing only text (no pictures). E.g. if you have compressed text in records 1,2 and 3, then set it to 3. The uncompressed size (dword at 4) has to be the full uncompressed size of all text.
By the way, I was wrong. Mobi format 3 needs MOBI header to be 0x74 bytes long, not 0x18. The fields are mostly irrelevant except for the number of the first record with images I mentioned above (at 0x5C).
There are also DATP records that contain mapping from uncompresed offset to record numbers but I didn't figure out their format yet and not sure if they're mandatory...

11-26-2007, 08:53 PM	#28
igorsk Wizard Posts: 3,442 Karma: 300001 Join Date: Sep 2006 Location: Belgium Device: PRS-500/505/700, Kindle, Cybook Gen3, Words Gear	The "number of records" in palmdoc header (Word at 0x8) needs to be set to the number of records containing only text (no pictures). E.g. if you have compressed text in records 1,2 and 3, then set it to 3. The uncompressed size (dword at 4) has to be the full uncompressed size of all text. By the way, I was wrong. Mobi format 3 needs MOBI header to be 0x74 bytes long, not 0x18. The fields are mostly irrelevant except for the number of the first record with images I mentioned above (at 0x5C). There are also DATP records that contain mapping from uncompresed offset to record numbers but I didn't figure out their format yet and not sure if they're mandatory...