Quote:
Originally Posted by jhowell
If you email a Master MOBI (what calibre calls "MOBI file type: both") it will include both the old MOBI format and the newer AZW3 format in a single file. It will be split up by Amazon and only one or the other format will be actually delivered, whichever format is best supported by that device.
Personally, I prefer to use Amazon's tool, kindlegen, instead of calibre to produce Master MOBIs. It makes fewer changes to the original source file. Also sometimes calibre converted files are rejected by Amazon for unknown reasons.
I second this. Kindles are able to pan and zoom images so that you can see more detail if something is unclear. You lose this capability if you allow calibre to reduce the resolution of images in your books.
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That's interesting, I had never heard of kindlegen until now. Are Kindles able to open Master MOBIs that still have both formats contained inside the file (like if I were to put the file directly onto the Kindle via USB)? Also, am I correct in assuming that kindlegen only creates Master MOBIs (no option to output a single format)?
In regards to Amazon rejecting Calibre-converted files, do the files have problems being read by Kindles if placed there via USB?