XnView Software

There are a handful of things missing from the AVIF settings panel that might be useful, for those who might want to use them:

* Lossless: Since the format supports it anyway.
* Auto/8/10-bit output, instead of just 8: Even with 8-bit input, forced 10 bit output is sometimes dramatically better quality, especially at lower sizes.
(Granted, I'd love an entire 16-bit pipeline in xnview someday, but that's a distant dream.)
* AQ-mode 1: Sometimes dramatically better quality at any size, but usually at least some perceptible improvement in flat or dark areas.

I'd like to bump this, as they're mostly just checkboxes that lead to an extra parameter internally.

And one other thing:
* Allow RGB as an output colorspace, to guarantee fully lossless end-to-end, otherwise the conversion to/from YUV introduces some errors even at 4:4:4.

I guess I accidentally posted to the wrong forum, could this be moved to feature requests as well?