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1. A script for finding the smallest lo... A script for finding the smallest lossless encoding of a PNG or GIF input image (that I know of).

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   #!/bin/sh

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   # Licensed under the Zero-Clause BSD terms: https://opensource.org/license/0bsd

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   # Requires pngquant, oxipng, gifsicle, gif2apng, libwebp, and optionally perl-image-exiftool.

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2. POSIX sh script to create AVIF for t... POSIX sh script to create AVIF for target SSIM value using binary search, requires `imagemagick` and `cavif`.

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   #!/bin/sh

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   # Licensed under the Zero-Clause BSD terms: https://opensource.org/license/0bsd

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   # Requires `imagemagick` and `cavif`.

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3. A script which finds the minimum PNG... A script which finds the minimum PNG dimensions for a given aspect ratio and pixel count, creates a colour-cycling PPM file, and then converts it to PNG.

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   #!/bin/sh

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   # Licensed under the Zero-Clause BSD terms: https://opensource.org/license/0bsd

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   # Requires imagemagick, and optionally pngquant & optipng

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   #