epub - How to generate .mobi file for Kindle that supports Kindle Reading Speed feature -


i generating multi-chapter ebook kindle fire first generating well-formed xhtml-based epub 3.0 format file , converting .epub file .mobi w/ kindle previewer and/or kindlegen. generated .mobi file transfers kindle , looks entirely correct. problem generated file never produces "learning reading speed" status @ bottom or actual estimate of reading time. reading speed feature never seems activated .mobi file generated kindlegen. i'm aware status area cycles through various features/statuses pressing status area on reader screen , feature never activated.

i have generated alternate version of .mobi file using calibre , reading speed feature enabled, format of output file heavily altered , not consistent kindlegen format.

what key generating kindle .mobi file kindlegen supports reading speed feature?

i discovered answer, generated .mobi file needs 2 tags manually added, 113 asin , 501 cdecontenttype = ebok, in correct primary header of .mobi file.

the tag information published elsewhere, overlooks kindlegen generated .mobi file can have 2 versions of same book embedded within .mobi file, each primary header. if tags added first primary header (typically v6 header) not second primary header (typically v8 header), kindle device not recognize tags.

in case, tags needed added second primary header allowed kindle device treat file book rather document. .mobi tag editors reference first primary header only, can cause confusion. alternately, .mobi split 2 files in case tags manually added primary header of relevant post-split file.


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