Support opening and saving L mode AVIF images with libavif >= 1.3.0#9471

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python-pillow:mainfrom

radarhere:avif_gray

Jun 3, 2026

Commits on Mar 18, 2026

Simplified code
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Do not iterate through all images to check if there is only one frame
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Load frames with 4:0:0 subsampling in L mode with AVIF_RGB_FORMAT_GRAY
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If all frames are grayscale, default to 4:0:0 subsampling when saving
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If frame is grayscale, encode with AVIF_RGB_FORMAT_GRAY
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Commits on Mar 25, 2026

Merge branch 'main' into avif_gray
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Use all()
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Commits on Mar 27, 2026

Merge branch 'main' into avif_gray
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Merge branch 'main' into avif_gray
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Commits on May 28, 2026

Increase epsilon for libavif 1.4.2
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Commits on Jun 3, 2026

Merge branch 'main' into avif_gray
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