Can't get AVIF encode to work

[Zaczero]

Expected behaviour

I expect the imencode AVIF to work properly, as it's supported by the upstream OpenCV.

Actual behaviour

cv2.imencode('.avif', img)

cv2.error: OpenCV(4.10.0) /io/opencv/modules/imgcodecs/src/loadsave.cpp:1141: error: (-2:Unspecified error) could not find encoder for the specified extension in function 'imencode'

I have tried installing libavif on my system but that did not resolve the issue. I believe this is a build-time issue.

Steps to reproduce

pip install opencv-python-headless

import cv2
import numpy as np

print(cv2.__version__)  # '4.10.0'

cv2.imwrite('test.avif', np.zeros((100, 100, 3), np.uint8))

[asmorkalov]

AVIF support depends on libavif library. The dependency is optional and has a lot of own 3rd-parties. AVIF is disabled in opencv-python package for now. You have to re-built OpenCV to get it supported.

[Zaczero]

Hello. I think it's an oversight and major blocker as AVIF adoption keeps growing. This forced me to switch to Pillow that is unfortunately slower than opencv.

and has a lot of own 3rd-parties

Could you please clarify? libavif depends on codec implementation, let's say libaom - is there anything else? How does it differ from other formats currently supported?

You have to re-built OpenCV to get it supported.

Can you please guide me with resources so I know how to do that? I'm not experienced with this.