Thread: Certain books only transferring as epub, not kepub
View Single Post
Old 10-12-2021, 01:16 AM   #12
davidfor
Grand Sorcerer
davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.davidfor ought to be getting tired of karma fortunes by now.
 
Posts: 24,907
Karma: 47303748
Join Date: Jul 2011
Location: Sydney, Australia
Device: Kobo:Touch,Glo, AuraH2O, GloHD,AuraONE, ClaraHD, Libra H2O; tolinoepos
Quote:
Originally Posted by Deobulakenyo View Post
Yeah. Sometimes even an epub doesn't successfully convert to Kepub. One has to convert epub (original) to epub then to Kepub for conversion to work.

I do not understand why but it happens.
This illustrates why I am careful to differentiate between what the KoboTouchExtended driver does and a calibre conversion.

Using calibre to convert to a kepub will usually be successful. If it isn't, then most failures will be in the conversion to epub steps. If you have an epub and use calibre to convert to kepub, it will still run the full conversion pipeline and make all the changes that an epub-to-epub conversion would do. Then it does the kepubification steps.

But, the extended driver just tries to make changes to the existing epub. If there are problems with the epub, then there will be problems with that transformation. These are errors that will usually be shown by the error checking in the calibre editor. And will usually be fixed by an actual conversion.

And for the record, the kepubification steps in the extended driver and the conversion are identical. They use exactly the same code.

If anyone does find epubs that do not pass the kepubification steps, then please report them in the KoboTouchExtended thread in the calibre forum. Then we can look at why to see if the problem can be handled.
davidfor is offline   Reply With Quote