MP 1.8.1 export dialog - JPEGLI subsampling settings - 4:2:0 and 4:2:2 are swapped!

[masterjp]

I did some tests with the new export dialog and JPEGLI settings.
I saved one picture with different sub sampling settings (4:4:4, 4:2:2 and 4:2:0).
Here are the results of the filesizes. It shows, that the sub sampling 4:2:0 produce bigger filesize than 4:2:2.

Sub-sampling.png

It is absolutely unusual, because 4:2:0 uses a higher compression and it produces a smaller filesize!

Then I further checked the EXIF-data of all saved jpeg files.
The EXIF informations show, that sub sampling setting 4:2:2 delivers a jpegli sub sampling of 4:2:0!
The jpegli sub sampling of 4:2:0 saves the file with 4:2:2!

[xnview]

Thanks to your detailed description I can reproduce the problem.

[xnview]

This problem is supposed to be fixed in XnView MP 1.8.2. Please check and confirm the bug fix here.

[Kadet]

For me all is OK now (in Export and in Save As function).