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- @ECHO OFF
- cd /d "ffmpeg が置いてあるフォルダ指定"
- ffmpeg -i %1 -filter_complex palettegen palette.png -y
- ffmpeg -i %1 -i palette.png -filter_complex paletteuse 256colors.png -y
- ffmpeg -i 256colors.png -f lavfi -i nullsrc=d=1:s=1x1 -filter_complex [1:0]split[a][b];[a][0:0]scale2ref[a0][0];[a0]lutrgb=r=255:g=255:b=255[a1];[b]lutrgb=r=254:g=254:b=254[b0];[a1][b0]overlay=format=rgb[ab];[0][ab]alphamerge %~n1_256.png
- GOTO EXIT
- :EXIT
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