Difference between the kobo drivers?

[franklekens]

I have a Forma and an Ellipa. On both I've sideloaded the same books, but on the Forma I think I usually did it with the extended driver. Now on the Ellipsa I've sideloaded all those same books, but with the standard driver.

Can this be the explanation for some differences in *some* books that I've noticed so far?
I notice these problems on the Ellipsa:
E.g. there's one book where whatever font I choose, Kobo simply displays the publisher default.
In another book, every white line in the text is a cue for the Kobo to display the next paragraph (actually stanza, it's poetry) on the next page.
And it seems I can select "left justify" and don't fill out lines as much as I want, the Ellipsa does keep doing it.

This is just after I've emptied that Ellipsa of all books, done a factory reset and sideloaded these books. And they're the same books.

[franklekens]

Oh, of course. The extended driver makes them into kepubs, which allows you to use the statistics feature, I remember that now.
Well, apparently it also has these side effects.
Here's a photo of the same book on two devices (a free epub from Feedbooks):
https://fmlekens.home.xs4all.nl/nonc...riversDiff.jpg

On the one full justify can effectively disabled, on the other it can't.
Wish I had thought of that before, sigh.

(Although sideloading 1500 books at once doesn't seem to be a good idea with the extended driver. So there's that.)

[salamanderjuice]

Yes, Kobo uses two different epub renderers depending on file type. Epub uses Adobe's RMSDK and Kepub's use Kobo's home grown renderer. This impacts how books are displayed and some features are only implemented in one and not the other.

[PeterT]

Originally Posted by salamanderjuice

Yes, Kobo uses two different epub renderers depending on file type. Epub uses Adobe's RMSDK and Kepub's use Kobo's home grown renderer. This impacts how books are displayed and some features are only implemented in one and not the other.

Actually kepub uses the Access netfromt Epub renderer for Kepub

Sent from my Pixel 4a using Tapatalk

[franklekens]

Thanks for confirming, and for explaining about the renderer.

Leaves me with a bit of a quandary: I really really prefer the kepubs the extended plugin sideloads to the regular epubs of the standard driver. (In other words, I much prefer Kobo's homegrown renderer.)

But the extended plugin isn't very good for bulk sideloading. I'll have to do the hundreds of books in batches again, trying out every time how many the computer, or Calibre, or whatever, can handle.

I've had the Ellipsa more than a week, but so far it feels like I've spent more time getting books on it the way I want it than actually reading the thing. And I'm *not* a Kobo newbie. (At most a bit of a Kobo el stupido, maybe.)

[PeterT]

Check out pgaskin's kepubify "Kepubify" https://pgaskin.net/kepubify/

Sent from my Pixel 4a using Tapatalk

[MGlitch]

Alternatively just copy the kepub from your Forma to your computer then to your elipsa. I’d imagine calibre should treat the books on the elipsa as it does those on the Forma.

[davidfor]

Originally Posted by franklekens

Oh, of course. The extended driver makes them into kepubs, which allows you to use the statistics feature, I remember that now.
Well, apparently it also has these side effects.
Here's a photo of the same book on two devices (a free epub from Feedbooks):
https://fmlekens.home.xs4all.nl/nonc...riversDiff.jpg

On the one full justify can effectively disabled, on the other it can't.
Wish I had thought of that before, sigh.

(Although sideloading 1500 books at once doesn't seem to be a good idea with the extended driver. So there's that.)

The settings for the epub and kepub renderers override different things. Some are fairly brutal and override everything. Others are overridden at the top-level of the document, and if they are set lower, they won't be overridden. I've never really gone into it. I tend to remove any justification so that "normal" paragraphs don't have it. I will leave it where the style makes it useful. And I don't change it in the settings on the device.

As to the initial load, copying from the Forma is probably the quickest way to do it. After that, you are probably only adding a few books at a time, so it won't be as noticeable.

[JSWolf]

You could use Kepubify and then once all those are loaded and you've done a second connect to update the metadata and collections, you can delete the KePub from your Calibre library.

Kepubify V4 has new features for handling your Calibre library.

https://www.mobileread.com/forums/sh...d.php?t=340435

[franklekens]

Originally Posted by MGlitch

Alternatively just copy the kepub from your Forma to your computer then to your elipsa. I’d imagine calibre should treat the books on the elipsa as it does those on the Forma.

Aaargh, of course. Why didn't I think of that.

Also thanks for the kepubify tips, I hadn't heard of that before.