Version 4.1.0 and PNG files issue

[Paultx]

The shell extension has been flawlessly working here with all supported image files, PNG included. But yesterday I received from a coworker two PNG files that can't show thumbnails.

PNG file
▼

xnv1.png

PNG file from coworker
▼

xnv2.png

This is odd for two reasons:

- Other PNG I already had on my system are OK as to thumbs.

- The files from my coworker are 19 MB in size and I have set the option No thumbnail for file size greater than to 120 MB.

Unless there is other explanation, my guess is that it happens because the PNG files I have on my system were created on Windows, while the coworker PNG files were created on a Mac.

My guess is right or not? TIA.


Windows 10 Pro 20H2 19042.844

[xnview]

please send me the files?

[Paultx]

please send me the files?

The Attachments tool here shows an error message saying the files are too large. How can I send them to you via this forum?

[xnview]

you can send it to me contact at xnview dot com

[xnview]

These files contains a iTXT data too high (default is 8000000 bytes max) for libpng

[Paultx]

These files contains a iTXT data too high (default is 8000000 bytes max) for libpng

Thank you very much for the answer, but... it's archaic Aramaic to me!

What is "iTXT data"? Is it something a simple user like me can deal with? I searched online to try to understand what it is, but it seems to be something only programmers and the like can deal with.

For example, when I generate a PNG image using CorelDRAW, I have a lot of options to set, like color mode, transparency, etc. before I export it.
▼

png_test.png

Is there a way this "iTXT data" can be modified when saving the image in the PNG format? If it's possible, I can tell that coworker to adjust things before he sends me PNG images. NB: I work with Windows, he works with a Mac.

TIA.

[xnview]

iTXT data is used to store metadata

I'll add the support for large iTXT data