AVIF – AV1 based image format
This is a format combining HEIF as the container with AV1 I-frames as the payload.HEIF is the Nokia-developed, MPEG and ISO-blessed container for image sequences and transforms, which is published as MPEG-H Part 12, and is based on the good-old ISOBMFF, which you typically recognize as the ".MP4 container". HEIF's most wide deployment right now is on Apple iPhones, where it's the new default capture format for still images and 'live' images (effectively, a short video on either side of a high-res still).AV1 is the AOMedia-developed, Google/ex-On2/Xiph.Org/Cisco consensus video format that's the evolution of the VP8/VP9 line and Daala.This format takes the nice royalty-free state-of-the-art MPEG container and puts a royalty-free payload in it, making it a useful best-of-both-worlds.