libavif

Library for encoding and decoding AVIF image files

brewmacoslinux

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Library for encoding and decoding .avif files

avifencavifdec

Encode a PNG image to AVIF format$ avifenc input.png output.avif

Decode an AVIF image to PNG format$ avifdec input.avif output.png

Encode with quality setting (0-63, higher is better quality)$ avifenc -q 60 input.jpg output.avif