Originally Posted by JSWolf
The only real way to convert PDF to another format is after the conversion, you HAVE to take the PDF and the converted file and A/B compare every paragraph, every sentence, every word, every letter, every punctuation mark and every style. There's no way to convert a novel length PDF to anything else without errors and the A/B compare is the only way to be sure of no conversion errors.
Yes, that is true if you want a perfect conversion. But a readable conversion can be had with much less work. I used to use BookDesigner 5 to convert from PDF to LRF with acceptable results and minimal editing. Unfortunately BookDesigner does not support ePub, so an extra step would be needed.
Calibre is also one of the worst converters, it totally ruins paragraph and page layout with 1 line and empty pages, etc.
I will try the methods described by the thread starter.