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@antonmedv
Created December 2, 2018 15:40
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#!/usr/bin/env bash
fd frame | while read line; do
convert $line \
\( +clone -alpha extract \
-draw 'fill black polygon 0,0 0,15 15,0 fill white circle 15,15 15,0' \
\( +clone -flip \) -compose Multiply -composite \
\( +clone -flop \) -compose Multiply -composite \
\) -alpha off -compose CopyOpacity -composite $line;
done
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