images don't display in converted mobi

xiatian · 08-13-2021, 10:42 AM

Hi,
When I convert an .epub file to a .mobi file, images won't display in my kindle (kpw3). But I'm sure it contains many images because when I open it in PC calibre, images can display. The .epub is also generated by calibre. You can test both the .epub and .mobi files in the attachments.

Not all of my other converted books have such problems. Just some of them, but I can't find out why. I'm so confused.

Anyone can help me? Please!

kovidgoyal · 08-13-2021, 11:01 AM

try converting to azw3 instead.

kovidgoyal · 08-13-2021, 11:22 AM

I took a quick look and it seems like this is a bug in the kindle MOBI renderer. its just not rendering those jpeg images. And I dont see anything special about them, but simply doing a jpeg to jpeg conversion of them causes them to work, so definitely a bug in the kindle renderer.

xiatian · 08-13-2021, 12:07 PM

Quote:

Originally Posted by kovidgoyal

try converting to azw3 instead.

My kindle doesn't display azw3...

xiatian · 08-13-2021, 12:09 PM

Quote:

Originally Posted by kovidgoyal

I took a quick look and it seems like this is a bug in the kindle MOBI renderer. its just not rendering those jpeg images. And I dont see anything special about them, but simply doing a jpeg to jpeg conversion of them causes them to work, so definitely a bug in the kindle renderer.

Just some normal images, can't see why kindle won't display them...

kovidgoyal · 08-13-2021, 12:14 PM

Quote:

Originally Posted by xiatian

Just some normal images, can't see why kindle won't display them...

Because it has a bug in its renderer.

xiatian · 08-13-2021, 12:33 PM

Quote:

Originally Posted by kovidgoyal

Because it has a bug in its renderer.

Did you try converting it to azw3? I tried, and copied it into documents, but my kindle can't display it. Weird, too...

kovidgoyal · 08-13-2021, 12:39 PM

It displays fine as azw3 in kindle previewer. Its a whole different renderer.

DNSB · 08-13-2021, 12:42 PM

Is it possible those jpegs are CMYK and not RGB? I've seen that issue with jpegs from Photoshop that were saved for printing not viewing. See sample information from Irfanview in the attached images.

kovidgoyal · 08-13-2021, 12:55 PM

No I already checked that and calibre autoconverts cmyk jpegs to rgb ones for epub output because ADE cnt handle cmyk jpegs.

xiatian · 08-14-2021, 01:38 AM

Quote:

Originally Posted by kovidgoyal

try converting to azw3 instead.

I tried many times. If I use calibre to convert it to azw3 and copy it into kindle via USB. It won't appear in kindle.

kovidgoyal · 08-14-2021, 01:40 AM

WHy is that surprising given you say your kindle doesnt support azw3?

xiatian · 08-14-2021, 03:54 AM

Quote:

Originally Posted by kovidgoyal

WHy is that surprising given you say your kindle doesnt support azw3?

That's what confused me. Doesn't Kindle Paperwhite 3 support .azw3?

kovidgoyal · 08-14-2021, 04:14 AM

I dont recall, probably it does if it has up to date firmware. If all azw3 files sent to your kindle aren't opening, and it actually supports azw3, then you should read this: https://manual.calibre-ebook.com/faq...id-not-show-up

xiatian · 08-14-2021, 05:04 AM

Quote:

Originally Posted by kovidgoyal

I dont recall, probably it does if it has up to date firmware. If all azw3 files sent to your kindle aren't opening, and it actually supports azw3, then you should read this: https://manual.calibre-ebook.com/faq...id-not-show-up

Found a solution to work around this.
I tried to convert it from .mobi to .azw3 (NOT from .epub to .azw3) and then it appeared in my kindle.

08-13-2021, 12:42 PM	#9
DNSB Bibliophagist Posts: 44,727 Karma: 168431851 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	Is it possible those jpegs are CMYK and not RGB? I've seen that issue with jpegs from Photoshop that were saved for printing not viewing. See sample information from Irfanview in the attached images. Attached Thumbnails

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08-13-2021, 11:01 AM	#2
kovidgoyal creator of calibre Posts: 45,182 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	try converting to azw3 instead.

08-13-2021, 11:22 AM	#3
kovidgoyal creator of calibre Posts: 45,182 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	I took a quick look and it seems like this is a bug in the kindle MOBI renderer. its just not rendering those jpeg images. And I dont see anything special about them, but simply doing a jpeg to jpeg conversion of them causes them to work, so definitely a bug in the kindle renderer.

08-13-2021, 12:39 PM	#8
kovidgoyal creator of calibre Posts: 45,182 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	It displays fine as azw3 in kindle previewer. Its a whole different renderer.

08-13-2021, 12:55 PM	#10
kovidgoyal creator of calibre Posts: 45,182 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	No I already checked that and calibre autoconverts cmyk jpegs to rgb ones for epub output because ADE cnt handle cmyk jpegs.

08-14-2021, 01:40 AM	#12
kovidgoyal creator of calibre Posts: 45,182 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	WHy is that surprising given you say your kindle doesnt support azw3?

08-14-2021, 04:14 AM	#14
kovidgoyal creator of calibre Posts: 45,182 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	I dont recall, probably it does if it has up to date firmware. If all azw3 files sent to your kindle aren't opening, and it actually supports azw3, then you should read this: https://manual.calibre-ebook.com/faq...id-not-show-up

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