Hello Willus,
Thank you for excellent tool!
But sometimes the process of conversion is failed with message like this one:
SOURCE PAGE 153 of 362 (8.3 x 11.7 in) ... Segmentation fault: 11
after restarting the process it failed at another page:
SOURCE PAGE 258 of 362 (8.3 x 11.7 in) ... warning: freetype could not find any cmaps
Segmentation fault: 11
It depends on the command line settings. For example, with Kindle failed, with Kindle Paperwhite works OK.
My version is
k2pdfopt v2.21 (w/MuPDF,DjVuLibre,OCR) (c) 2014, GPLv3,
http://willus.com
Compiled Jul 25 2014 with Gnu C v4.2.1 for OS/X on x64.
MAC OSX Maverics
I could share with you my example of pdf file.