c96d60a840
Features of AVIF include: * Lossless and lossy compression. * High dynamic range (HDR) images * Wide color gamut images (i.e. 10- and 12-bit color depths) * Transparency (through alpha planes). * Animations (with an optional cover image). * Auxiliary image sequences, where the file contains a single primary image and a short secondary video, like Apple's Live Photos. * Metadata rotation, mirroring, and cropping. The AVIF format is still relatively new and some of these features aren't well supported by browsers or other software: * Animated AVIFs aren't supported by Firefox or by libvips. * HDR images aren't supported by Firefox. * Rotated, mirrored, and cropped AVIFs aren't supported by Firefox or Chrome. * Image grids, where the file contains multiple images that are tiled together into one big image, aren't supported by Firefox. * AVIF as a whole has only been supported for a year or two by Chrome and Firefox, and less than a year by Safari. For these reasons, only basic AVIFs that don't use animation, rotation, cropping, or image grids can be uploaded.
8 lines
329 B
Markdown
8 lines
329 B
Markdown
Test file sources:
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* https://github.com/link-u/avif-sample-images
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* https://github.com/AOMediaCodec/av1-avif/tree/master/testFiles
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* https://github.com/AOMediaCodec/libavif/tree/main/tests/data
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* https://colinbendell.github.io/webperf/animated-gif-decode/avif.html
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* https://0xc0000054.github.io/pdn-avif/using-image-grids.html
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