avifenc: add --noalpha flag to discard alpha channel on encode#3130
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enyetsuen wants to merge 2 commits intoAOMediaCodec:mainfrom
Open
avifenc: add --noalpha flag to discard alpha channel on encode#3130enyetsuen wants to merge 2 commits intoAOMediaCodec:mainfrom
enyetsuen wants to merge 2 commits intoAOMediaCodec:mainfrom
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wantehchang
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Mar 24, 2026
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Adds an option to avifenc to ignore and discard any alpha channel present in the input image and encode the output as fully opaque. This is useful for cases where input assets contain unintended or accidental alpha channels (for example, PNGs exported by certain tools that always include an alpha plane), but the final AVIF output is intended to be RGB-only. Also helps with avoiding unnecessary alpha processing overhead during encoding.
The feature aligns with existing behavior in encoders such as WebP's cwebp, which already provides a -noalpha option to discard transparency when it is not required.
It was also requested by users at #1665