2019-07-11 15:08:19 +02:00
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#!/usr/bin/env bash
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if [ $# -ne 3 ]; then
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echo -e "\033[31;1merror:\033[0m this script expects three arguments, the file, the starting time and the duration."
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exit 1
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fi
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2019-12-06 11:45:04 +01:00
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if [ ! -f "$1" ]; then
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2019-07-11 15:08:19 +02:00
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echo -e "\033[31;1merror:\033[0m couldn't open $1: no such file."
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exit
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fi
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palette_dir=$(mktemp -d)
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ffmpeg -y -ss $2 -t $3 -i $1 \
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-vf fps=10,scale=320:-1:flags=lanczos,palettegen $palette_dir/palette.png > /dev/null 2>&1
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ffmpeg -ss $2 -t $3 -i $1 -i $palette_dir/palette.png -filter_complex \
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"fps=10,scale=320:-1:flags=lanczos[x];[x][1:v]paletteuse" -y output.gif > /dev/null 2>&1
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rm -rf $palette_dir
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