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Metadata for AVIF, format returned as 'heif'

See original GitHub issue

Using Sharp 27, which now supports AVIF and is great. Thanks!

Downloading this image and then extracting metadata with sharp(inputavif).metadata()

http://download.opencontent.netflix.com.s3.amazonaws.com/AV1/Chimera/AVIF/Chimera-AV1-10bit-1280x720-2380kbps-100.avif

The format returned is heif as that’s the encoder used by libvips.

Is it true that this metadata format will be returned for both avif and heic images?

If so, it’s not going to be possible to use the metadata to distinguish between the two, one of which is patent-encumbered and cannot be processed without globally installed libvips, as I understand it.

Would it be possible for the libvips metadata to return avif as the format, for consistency with mime type headers and Sharp output format strings?

Issue Analytics

State:
Created 3 years ago
Comments:8 (5 by maintainers)

Top GitHub Comments

1reaction

lovellcommented, Dec 30, 2020

libvips v8.11.0 will contain logic to expose the heif-compression metadata - see https://github.com/libvips/libvips/pull/1850

0reactions

lovellcommented, Aug 18, 2021

The object returned/resolved by toBuffer() contains properties that are calculated or might change during processing. The compression property of avif() is known before processing and does not change during.

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