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xverges/xv.video.speedup.sh

Created September 12, 2021 18:39
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xv.video.speedup.sh
#!/bin/zsh
set -euo pipefail
me=$(basename "$0")
if [ $# -ne 2 ]; then
echo "USAGE: ${me} <input> <speed_increment>"
# TODO: print usage
exit 1
fi
filename="${1%.*}"
extension="${1##*.}"
output=${filename}.$2.${extension}
ffmpeg -i $1 -vf "setpts=(PTS-STARTPTS)/$2" -crf 18 -af atempo=$2 ${output}
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