Mobi KF8 converted from Epub unable to open

[abogdan1]

Hello
I am trying to convert .epub file into .mobi file using ebook-convert. I need new mobi version (KF8). After conversion, the mobi file opens on my computer. However, when I transfer it to my Kindle (Kindle Paperwhite 4), I get the following message:
Unable to Open Item
The selected item could not be opened. If you purchased this item from Amazon, delete the item and download it again from Cloud on Home.

Has anyone else had this problem, and how can I get around it?

Both the input and output files attached.

The command I use:
ebook-convert in.epub out.mobi --dont-compress --mobi-keep-original-images --mobi-file-type new

Spoiler:

Conversion output:
Conversion options changed from defaults:
mobi_keep_original_images: True
dont_compress: True
mobi_file_type: 'new'
1% Konwertuję plik źródłowy na plik HTML...
InputFormatPlugin: EPUB Input running
on /xxx/xxx/xxx/xxx/in.epub
Found HTML cover OPS/coverpage.xhtml
Parsing all content...
34% Trwają procesy transformacji e-booka...
Merging user specified metadata...
Detecting structure...
Detected chapter: xxxxx Lorem ipsum dolor sit amet consectetur adipi
Detected chapter: XXXX Lorem ipsum dolor sit amet consectetur adipis
Detected chapter: XXX Lorem ipsum dolor sit amet consectetur adipisc
Flattening CSS and remapping font sizes...
Source base font size is 13.20000pt
Removing fake margins...
Cleaning up manifest...
Trimming unused files from manifest...
Creating MOBI Output...
67% Działa wtyczka MOBI Output
Serializing resources...
Splitting markup on page breaks and flow limits, if any...
Creating KF8 output
Generating in-line ToC
Generating KF8 markup...
Creating indices...
MOBI output written to /xxx/xxx/xxx/xxx/out.mobi
Plik wyjściowy zapisany do /xxx/xxx/xxx/xxx/xxx.mobi

[Quoth]

New mobi KF8 = azw3/KF8

Use azw3. "New mobi KF8" is for dual mobi where you don't know if it's a gen1, gen2 kindle (the only ones needing old mobi) or gen3 and later.


See does current file work if renamed to azw3.

[abogdan1]

Thank You for Your response.
You're right. azw3 opens on my kindle.
But there is problem with styles. Epub has special styles for dark mode (because of eaa - european accessibility act). When I convert epub to mobi/azw3 the letters are pale and it is impossible to read the book. That was the reason why I wanted to convert it as I mentioned.
So maybe is there a way to convert epub to mobi/azw3 without epub styles?

And why azw3 opens on my kindle and out.mobi does not?

[Sirtel]

Originally Posted by abogdan1

Thank You for Your response.
You're right. azw3 opens on my kindle.
But there is problem with styles. Epub has special styles for dark mode (because of eaa - european accessibility act). When I convert epub to mobi/azw3 the letters are pale and it is impossible to read the book. That was the reason why I wanted to convert it as I mentioned.
So maybe is there a way to convert epub to mobi/azw3 without epub styles?

When converting, check the box before Colors in Look & Feel -> Styling -> Select what style information you want completely removed and enter color in Look & Feel -> Styling -> Other CSS Properties.

[abogdan1]

Ooo, thank You Sirtel, now it looks nice!
Do you know if I am able to do it with command tool (eboook-convert) ?
ebook-convert in.epub out.azw3 --filter-css color?

[Sirtel]

Originally Posted by abogdan1

Ooo, thank You Sirtel, now it looks nice!
Do you know if I am able to do it with command tool (eboook-convert) ?
ebook-convert in.epub out.azw3 --filter-css color?

Well, you can try. I know nothing about command line, sorry.

[Quoth]

Originally Posted by abogdan1

And why azw3 opens on my kindle and out.mobi does not?

It expects a *.mobi to have KF7 (old mobi) inside it.

[abogdan1]

Thank You both!

There is one last thing I would like to know in this matter. My epub has style with @media:
@media (prefers-color-scheme: dark) {}

I would like to remove it during conversion using command tool: ebook-convert.

Does anyone have any knowledge on this subject?

[JSWolf]

Originally Posted by abogdan1

Thank You both!

There is one last thing I would like to know in this matter. My epub has style with @media:
@media (prefers-color-scheme: dark) {}

I would like to remove it during conversion using command tool: ebook-convert.

Does anyone have any knowledge on this subject?

You are best to edit the CSS and HTML by hand using the editor. That way you can get rid what you don't want and fix what needs fixing.

[abogdan1]

Thank you all.
Unfortunately, I can't use the editor. I'm programming an application and need to use a command-line tool.
My solution is:
ebook-convert in.epub out.mobi --mobi-file-type old --filter-css color --extra-css "body { background-color: #fff; color: #000; }"

[Quoth]

Old mobi is ghastly and obsolete before Amazon adopted it for the Kindle in 2017. Actually obsolete when Amazon bought Mobipocket in 2005!

Only gen1 & gen 2 Kindles need it. The azw3 was backported to older models, as old as K3.

[JSWolf]

Originally Posted by abogdan1

Thank you all.
Unfortunately, I can't use the editor. I'm programming an application and need to use a command-line tool.
My solution is:
ebook-convert in.epub out.mobi --mobi-file-type old --filter-css color --extra-css "body { background-color: #fff; color: #000; }"

You do not want color codes. You'll have to forgo your app and use the editor. It's the only way to make sure you get the CSS correct.