Conversion of mobi files to mp4 file format

mobi to mp4 conversion is typically related to attempt to convert digital book to audio book, i.e. conversion of Mobipocket ebooks to MP4 audio. The most reliably way how to achieve this, would be to use some text-to-speech converter, such as Balabolka, that will generate audio file (.mp4) from text source (.mobi). This in most cases uses the voices provided by Microsoft, but some programs have their own unique ones.

Open MOBI file    Open MP4 file