Quote:
Originally Posted by Joefish
Why does the KindleGen output such poor quality images even with compression turned off?
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Because the built-in image converter does a lousy job and because the KindleGen compression options only affect
text compression.
IIRC, there's an image resizing cutoff size somewhere between 64-128KB. If you resize your images yourself
before compiling your book with KindleGen, KindleGen (usually) won't resize them again.
However, there doesn't seem to be any fixed number, because KindleGen sometimes won't touch a 120KB image but will resize a 100KB image in the same book.
You can down-convert your images to a specific size with
ImageMagick (freeware command line tool).
For example:
Code:
convert -define jpeg:extent=128kb large.jpg small.jpg
BTW, you can find out how much KindleGen resizes your image by unpacking your mobi file with the
KindleUnpack Calibre plugin or the
standalone utility.
Quote:
Originally Posted by Joefish
Can I submit the mobi file Calibre made to the Kindle store, and if so, are there any problems/limitations I need to know about?
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Many self-publishers have successfully submitted Calibre-generated Kindle books, however, KDP has been known to occasionally reject Calibre-generated Kindle books.