Summary of your issue

When calling EmEncode with .avif extension an exception is being generated, informing the encoder is not available. OpenCV 4.9 documentation mentions support for this format.

Environment

Write your environment.

OpenCV4Sharp 4.9 Windows 11 x64 Visual Studio 2022 17.9.7

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Example code:

private readonly int[] _parametersAvif = [512, 60];
Cv2.ImEncode(".avif", _image, out byte[] buffer, _parametersAvif);

Output:

OpenCvSharp.OpenCVException: 'could not find encoder for the specified extension'

What did you intend to be?

Return the buffer containing the encoded image

shimat / opencvsharp

Avif encoder not available #1671

Summary of your issue

Environment

Example code:

Output:

What did you intend to be?