GIMP Version: 2.8.14
Operating System: Windows
OS Version: 10
GIMP Experience: Intermediate Level
URL or Image link: https://www.gimp.org/release-notes/gimp-2.10.html

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Hi,

My problem is that I'm trying to export a file in jp2 (jpeg 2000) but i don't see the option under file types.

I saw in the release notes that now is support.


I was searching in google for an answer but i just found very old posts or threads about that.

If someone can help me.

Thanks in advance

From: https://www.gimp.org/news/2018/03/26/gimp-2-10-0-rc1-released/

"JPEG 2000 support ported to OpenJPEG

JPEG 2000 images importing was already supported, using the library called Jasper. Yet this library is now deprecated and slowly disappearing from most distributions. This is why we moved to OpenJPEG.

The port was initially started by Mukund Sivaraman. It was later completed by Darshan Kadu, under the FSF internship program, and mentored by Jehan who polished it up.

In particular, now GIMP can properly import JPEG 2000 images in any bit depth (over 32-bit per channel will be clamped to 32-bit and non-multiple of 8-bit will be promoted, for instance 12-bit will end up as 16-bit per channel in GIMP). Images in YCbCr and xvYCC color spaces will be converted to sRGB."

I hope this is helpful.

The problem is...

The release notes say The JPEG 2000 plug-in was rewritten to use the OpenJPEG library .... and of course the Gimp JPEG2000 plug-in is open only and does not export in jp2 format.

If you need jp2 format (why? not much used anywhere) export from Gimp as a png then XnConvert https://www.xnview.com/en/xnconvert/ will make you one.

Hi, i was just looking for a file format that preserve the quality and can reduce the kbs per file.

Which one do you recommend?

It's for websites and SEO proposes

Not so much what format you can make, as what format your web browser can handle.

Comparisons - standard lenna 512x512 RGB all very similar quality.
png - 473 KB
jpeg (90 quality) - 106 KB
jp2 -fixed size - 80 KB
heif (50 quality) - 37 KB

What is that last one, heif? Latest and greatest format, although you might have to use linux gimp 2.10 until the Windows plugin is fixed



However, does it matter when say Firefox will only open png's and jpg's

thank you a lot Rich,

I will continue then with the traditional jpeg until all browsers support this new format (for me) heif and can operate via windows

Not mentioning webp, not supported by Firefox either, but supported by Gimp 2.10.