webp and avif profile use flags

[Goverp]

While trying to find space-efficient scanned-image compression, I came across webp and avif, which IIUC will be the next great things, the first because Google says so, and the second because it's fully open source. So I was surprised that my setup didn't already include support, as neither use flag appears to be in the desktop profile. I appreciate this is both a technical impact to change a profile, and a "political" decision over what should be defaults.

FWIW I changed my make.conf USE flags (I know the new improved way is "*/* foo" in package.use, but old habits die hard, and anyway make.conf describes my system setup, so that seems a good home), and not too much recompilation.
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Greybeard

[Zucca]

avif is the image format based on av1 video codec, IIRC.

Out of interest, have you tried jpegxl?
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..: Zucca :..
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