Structure detection & splitting in ebook-edit?

ownedbycats · 10-09-2022, 10:15 PM

When converting files, the "structure detection" option will split apart long files. Is there an option like this in ebook-edit aside from doing it manually?

kovidgoyal · 10-09-2022, 10:35 PM

You mean you want to split on file size? No there is no automated tool to do that in the editor.

theducks · 10-10-2022, 05:28 AM

Way misusing
Preferences Output Options :EPUB Output: Split files larger than...

260K is the normal (for older reader devices), but you could make it smaller...I guess

DNSB · 10-10-2022, 10:55 AM

Quote:

Originally Posted by ownedbycats

When converting files, the "structure detection" option will split apart long files. Is there an option like this in ebook-edit aside from doing it manually?

No option in ebook-edit but my personal opinion is that it is better to split on chapter boundaries than to do a random split.

My process is to use Sigil, insert split markers at the chapter boundaries using regex to locate the boundaries and then split the file at those markers, then finish off with some manual splitting if needed.

ownedbycats · 10-10-2022, 10:59 AM

I noticed that structure detection will split at the chapter marks as long as you have the right XPath expression.

DNSB · 10-10-2022, 11:05 AM

Quote:

Originally Posted by ownedbycats

I noticed that structure detection will split at the chapter marks as long as you have the right XPath expression.

The fun is in finding that XPath expression. I often end up merging all the text files into a single file since bleepin' Gutenberg has a love for placing multiple chapters in a single file with the starting and ending chapters being split between different files.

That is, file 1 is chapters 1,2,3 and part of 4, file 2 is the rest of chapter 4, 5, 6 and part of 7, etc. A very annoying workflow.

ownedbycats · 10-10-2022, 11:36 AM

In my specific case, I have a book that the author decided to publish the book in a single HTML file even though the chapters are clearly marked. It causes ebook-viewer to freeze for a few seconds trying to open it and I don't even want to try it on my Kobo. I was hoping to fix it without doing an epub>epub conversion.

JSWolf · 10-10-2022, 01:22 PM

Quote:

Originally Posted by ownedbycats

In my specific case, I have a book that the author decided to publish the book in a single HTML file even though the chapters are clearly marked. It causes ebook-viewer to freeze for a few seconds trying to open it and I don't even want to try it on my Kobo. I was hoping to fix it without doing an epub>epub conversion.

If it doesn't have too many chapters, you can manually split the file at the chapters/sections.

retiredbiker · 10-10-2022, 03:21 PM

Quote:

Originally Posted by ownedbycats

In my specific case, I have a book that the author decided to publish the book in a single HTML file even though the chapters are clearly marked. It causes ebook-viewer to freeze for a few seconds trying to open it and I don't even want to try it on my Kobo. I was hoping to fix it without doing an epub>epub conversion.

In the editor there is a "split at multiple locations" tool. Just right-click on the big file, in the text, to see it. Again it wants an x-path expression, but here it is usually pretty simple, and there is a wizard. If you have, or can easily make, well-defined chapter boundaries (like H1, class = chapter), it's dead simple.

I often merge all the chapter files (yeah, thanks Gutenberg) and then use this.

Karellen · 10-10-2022, 03:57 PM

Quote:

Originally Posted by retiredbiker

In the editor there is a "split at multiple locations" tool. Just right-click on the big file, in the text, to see it.

Where? My screenshot below does not have that as an option.

I have been using the "Split file at selected location" button in the file preview screen, and sometimes that gets a bit annoying when there are 100+ chapters.

I know I could reconvert and use the split option in the settings, but when the chapters and paragraphs use the same tags, I haven't figured out a way to differentiate the two.

theducks · 10-10-2022, 04:15 PM

On the CODE of any HTML file

Karellen · 10-10-2022, 04:27 PM

Quote:

Originally Posted by theducks

On the CODE of any HTML file

Great. Thanks!! I didn't know that was there.

ownedbycats · 10-10-2022, 10:39 PM

I'll give that a try.

Thank you.

DoctorOhh · 12-19-2023, 09:39 PM

Quote:

Originally Posted by theducks

On the CODE of any HTML file

Thanks for pointing out the obvious. I have missed this simple right click for years. I simply merged the files in the editor, then split via an epub to epub conversion. This simple click is much easier.

Brett Merkey · 12-20-2023, 07:59 PM

"Is there an option like this in ebook-edit"

Are you looking for new files based on html structure, like chapters? Right-click within the code of the large file and select "Split at multiple locations."

10-09-2022, 10:15 PM	#1
ownedbycats Custom User Title Posts: 8,650 Karma: 61234567 Join Date: Oct 2018 Location: Canada Device: Kobo Libra H2O, formerly Aura HD	Structure detection & splitting in ebook-edit? When converting files, the "structure detection" option will split apart long files. Is there an option like this in ebook-edit aside from doing it manually?

10-09-2022, 10:35 PM	#2
kovidgoyal creator of calibre Posts: 43,866 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	You mean you want to split on file size? No there is no automated tool to do that in the editor. Last edited by kovidgoyal; 10-10-2022 at 12:08 PM.

10-10-2022, 11:36 AM	#7
ownedbycats Custom User Title Posts: 8,650 Karma: 61234567 Join Date: Oct 2018 Location: Canada Device: Kobo Libra H2O, formerly Aura HD	In my specific case, I have a book that the author decided to publish the book in a single HTML file even though the chapters are clearly marked. It causes ebook-viewer to freeze for a few seconds trying to open it and I don't even want to try it on my Kobo. I was hoping to fix it without doing an epub>epub conversion. Last edited by ownedbycats; 10-10-2022 at 11:40 AM.

12-20-2023, 07:59 PM	#15
Brett Merkey Not Quite Dead Posts: 194 Karma: 654170 Join Date: Jul 2015 Device: Paperwhite 4; Galaxy Tab	"Is there an option like this in ebook-edit" Are you looking for new files based on html structure, like chapters? Right-click within the code of the large file and select "Split at multiple locations." Last edited by Brett Merkey; 12-20-2023 at 08:08 PM.

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10-10-2022, 05:28 AM	#3
theducks Well trained by Cats Posts: 29,817 Karma: 54830978 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Way misusing Preferences Output Options :EPUB Output: Split files larger than... 260K is the normal (for older reader devices), but you could make it smaller...I guess

10-10-2022, 10:59 AM	#5
ownedbycats Custom User Title Posts: 8,650 Karma: 61234567 Join Date: Oct 2018 Location: Canada Device: Kobo Libra H2O, formerly Aura HD	I noticed that structure detection will split at the chapter marks as long as you have the right XPath expression.

10-10-2022, 04:15 PM	#11
theducks Well trained by Cats Posts: 29,817 Karma: 54830978 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	On the CODE of any HTML file

10-10-2022, 10:39 PM	#13
ownedbycats Custom User Title Posts: 8,650 Karma: 61234567 Join Date: Oct 2018 Location: Canada Device: Kobo Libra H2O, formerly Aura HD	I'll give that a try. Thank you.

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