Replace FLAC with ALAC version while preserving metadata and cover art

flac2alac.sh

#! /usr/bin/env bash

set -o errexit
set -o nounset
set -o pipefail

while IFS= read -r -d '' source; do
  echo
  echo ===============================================================================
  path=$(dirname "$source")
  target=$path/$(basename "$source" ".flac").m4a

  echo Input:  $source
  echo Output: $target

  ffmpeg -y -nostdin -i "$source" -vcodec copy -acodec alac "$target"
  rm -v "$source"
done < <(find . -type f -name '*.flac' -print0)