Redundant AAXtoMP3 now does this.

AAXtoM4A

@@ -1,108 +0,0 @@
-#!/usr/bin/env bash
-
-set -o errexit -o noclobber -o nounset -o pipefail
-
-codec=copy
-extension=m4a
-mode=chaptered
-GREP=$(grep --version | grep -q GNU && echo "grep" || echo "ggrep")
-
-if ! [[ $(type -P "$GREP") ]]; then
-    echo "$GREP (GNU grep) is not in your PATH"
-    echo "Without it, this script will break."
-    echo "On macOS, you may want to try: brew install grep"
-    exit 1
-fi
-
-if [ "$#" -eq 0 ]; then
-        echo "Usage: bash AAXtoM4A [--single] AUTHCODE {FILES}"
-        exit 1
-fi
-
-if [[ "$1" == '--single' ]]
-then
-    mode=single
-    shift
-fi
-
-if [ ! -f .authcode ]; then
-    auth_code=$1
-    shift
-else
-    auth_code=`head -1 .authcode`
-fi
-
-debug() {
-    echo "$(date "+%F %T%z") ${1}"
-}
-
-trap 'rm -r -f "${working_directory}"' EXIT
-working_directory=`mktemp -d 2>/dev/null || mktemp -d -t 'mytmpdir'`
-metadata_file="${working_directory}/metadata.txt"
-
-save_metadata() {
-    local media_file
-    media_file="$1"
-    ffprobe -i "$media_file" 2> "$metadata_file"
-}
-
-get_metadata_value() {
-    local key
-    key="$1"
-    normalize_whitespace "$($GREP --max-count=1 --only-matching "${key} *: .*" "$metadata_file" | cut -d : -f 2- | sed -e 's#/##g;s/ (Unabridged)//' | tr -s '[:blank:]' ' ')"
-}
-
-get_bitrate() {
-    get_metadata_value bitrate | $GREP --only-matching '[0-9]\+'
-}
-
-normalize_whitespace() {
-    echo $*
-}
-
-for path
-do
-    debug "Decoding ${path} with auth code ${auth_code}..."
-
-    save_metadata "${path}"
-    genre=$(get_metadata_value genre)
-    artist=$(get_metadata_value artist)
-    title=$(get_metadata_value title)
-    output_directory="$(dirname "${path}")/${genre}/${artist}/${title}"
-    mkdir -p "${output_directory}"
-    full_file_path="${output_directory}/${title}.${extension}"
-
-    </dev/null ffmpeg -loglevel error -stats -activation_bytes "${auth_code}" -i "${path}" -vn -codec:a "${codec}" -ab "$(get_bitrate)k" -map_metadata -1 -metadata title="${title}" -metadata artist="${artist}" -metadata album_artist="$(get_metadata_value album_artist)" -metadata album="$(get_metadata_value album)" -metadata date="$(get_metadata_value date)" -metadata track="1/1" -metadata genre="${genre}" -metadata copyright="$(get_metadata_value copyright)" "${full_file_path}"
-
-    debug "Created ${full_file_path}."
-
-    cover_path="${output_directory}/cover.jpg"
-    debug "Extracting cover into ${cover_path}..."
-    </dev/null ffmpeg -loglevel error -activation_bytes "${auth_code}" -i "${path}" -an -codec:v copy "${cover_path}"
-
-    if [ "${mode}" == "chaptered" ]; then
-        chaptercount=$($GREP -Pc "Chapter.*start.*end" $metadata_file)
-        debug "Extracting ${chaptercount} chapter files from ${full_file_path}..."
-
-        chapternum=1
-        while read -r -u9 first _ _ start _ end
-        do
-            if [[ "${first}" = "Chapter" ]]
-            then
-                read -r -u9 _
-                read -r -u9 _ _ chapter
-                chapter_title="${title} - $(printf %0${#chaptercount}d $chapternum) ${chapter}"
-                chapter_file="${output_directory}/${chapter_title}.${extension}"
-                </dev/null ffmpeg -loglevel error -stats -i "${full_file_path}" -i "${cover_path}" -ss "${start%?}" -to "${end}" -vn -codec:a copy -map 0:0 -map 1:0 -id3v2_version 3 \
-                    -metadata:s:v title="Album cover" -metadata:s:v comment="Cover (Front)" -metadata track="${chapternum}" -metadata title="${chapter_title}" \
-                    "${chapter_file}"
-                chapternum=$((chapternum + 1 ))
-            fi
-        done 9< "$metadata_file"
-        rm "${full_file_path}"
-        debug "Done creating chapters. Chaptered files contained in ${output_directory}."
-    fi
-
-    debug "Done."
-    rm "${metadata_file}"
-done