requires imagemagick 7 or higher for older version use: convert image.png -bordercolor white -border 0 \ \( -clone 0 -resize 16x16 \) \ \( -clone 0 -resize 32x32 \) \ \( -clone 0 -resize 48x48 \) \ \( -clone 0 -resize 64x64 \) \ -delete 0 -alpha off -colors 256 favicon.ico or convert -resize x16 -gravity center -crop 16x16+0+0 input.png -flatten -colors 256 favicon.ico
Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?
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