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imgcodecs: avif: set matrixCoefficients to UNSPECIFIED for monochrome images

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Fixes issue with libavif >= 1.3.0 where subsampling with identity matrix
coefficients is invalid. Aligns OpenCV AVIF writer with updated libavif
conformance rules.
This commit is contained in:
Akash A
2025-11-23 12:13:54 +00:00
parent 49607438bd
commit 79cfef49ff
1 changed files with 1 additions and 1 deletions
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modules/imgcodecs/src/grfmt_avif.cpp
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@@ -86,7 +86,7 @@ AvifImageUniquePtr ConvertToAvif(const cv::Mat &img, bool lossless, int bit_dept
result->yuvFormat = AVIF_PIXEL_FORMAT_YUV400;
result->colorPrimaries = AVIF_COLOR_PRIMARIES_UNSPECIFIED;
result->transferCharacteristics = AVIF_TRANSFER_CHARACTERISTICS_UNSPECIFIED;
result->matrixCoefficients = AVIF_MATRIX_COEFFICIENTS_IDENTITY;
result->matrixCoefficients = AVIF_MATRIX_COEFFICIENTS_UNSPECIFIED;
result->yuvRange = AVIF_RANGE_FULL;
result->yuvPlanes[0] = img.data;
result->yuvRowBytes[0] = img.step[0];