reencode.sh

   1 #!/usr/bin/env bash
   2 # shellcheck disable=SC1004
   3 # shellcheck disable=SC2016
   4 # shellcheck disable=SC2126
   5 set -eux
   6 test $# -gt 0 ||
   7 set -- "${0%/*}"/{old,new}/audio
   8 find "$@" -depth -type f -name "*.mp3" -print0 | sort -n -z |
   9 xargs -0 -P "$(lscpu --online -p | grep -v "#" | wc -l)" -I {} bash -c '
  10   nice -n 19 ffmpeg -y -i "$0" \
  11     -c:a libopus -b:a 64k \
  12     -application voip "${0%.*}.opus" &&
  13   rm -vf "$0"
  14 ' {} \;