Quote:
Originally Posted by twynn92
Wait, so even Kindle for PC 1.17.x (last version before KFX was used) had low-resolution images embedded in the KF8 which was worked around via an AZW6 resource ancillary? So for Kindle Unpack, what's the difference with having the -i parameter versus without it? I doubt Kindle Unpack took into account the AZW6...
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There are several variations of how Kindle books can be structured. When kindlegen creates a Master MOBI file it contains old MOBI and KF8 formats in the same file with a shared set of images. It can also have a CONT section with higher resolution images. The -i option will cause Kindleunpack to use the high resolution images from the CONT section instead of the lower resolution images.
Typically the KF8 section is delivered to reading devices an AZW3 file with low resolution images. The CONT section may also be delivered in a separate AZW6 file. Kindleunpack does not handle that situation and neither does calibre as far as I know.
I vaguely remember that there was a special situation where the combined KF8/CONT could be delivered by Amazon as a single file, but I'm not sure about that. If such files exist then the -i option of Kindleunpack will work with them also.