I have been testing the Previewer 3 beta on a large number of EPUBs and so far the results have not been encouraging.
For EPUBs that validate with both the calibre editor and EpubCheck the failure rate for conversion with the Previewer in my tests has been about 50%. For random EPUBs from various sources that render fine but may have internal coding issues the failure rate runs about 80%. Sometimes I can determine the cause of the failure from the Previewer logs, but often the error message just indicates that the conversion software crashed.
Hopefully the final release will work more reliably, but I wouldn't count on it. This high failure rate makes it more of a toy than a practical tool for generating books with enhanced typesetting.
I am curious if anyone else has been testing the Previewer and had better results.
Quote:
Originally Posted by cerem0ny
Yes! Yes! Yes!
Hurry! Hurry! Hurry!
Take all my money!
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Obviously you are joking here! (If not then just how much money DO you have?
)
Still, I would like to set reasonable expectations. The process of converting a book from EPUB to a KFX file that can be sideloaded will need to rely on the Previewer. It is likely to be time consuming, error prone, and fail with more books than it succeeds (see above). Even when it does work you could get a similar result with less effort using the
Hyphenate This! calibre plugin.