XnView Software

If saving a file in jp2000 format choosing
option quality 80% is about the same as lossless option.

Saving with IrfanView with Q=80% produces a file with only a third size.

==> Bug with saving option.

i've tried, the output file is not the same. And i don't use same jpeg2000 codec as I****

???

Are saying that everything is OK then?

???

yes, you can't compare quality between 2 different coders