mirror of
https://github.com/KrumpetPirate/AAXtoMP3.git
synced 2024-11-18 03:08:57 +01:00
Inserting code comments for the next guy.
This commit is contained in:
upuv
parent
f2c78da132
commit
ac656f9723
195
AAXtoMP3
195
AAXtoMP3
@ -41,13 +41,14 @@ fi
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# Variable validation
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# Variable validation
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set -o errexit -o noclobber -o nounset -o pipefail
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set -o errexit -o noclobber -o nounset -o pipefail
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# -----
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# Detect which annoying version fo grep we have
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GREP=$(grep --version | grep -q GNU && echo "grep" || echo "ggrep")
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GREP=$(grep --version | grep -q GNU && echo "grep" || echo "ggrep")
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if ! [[ $(type -P "$GREP") ]]; then
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if ! [[ $(type -P "$GREP") ]]; then
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echo "$GREP (GNU grep) is not in your PATH"
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echo "$GREP (GNU grep) is not in your PATH"
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echo "Without it, this script will break."
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echo "Without it, this script will break."
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echo "On macOS, you may want to try: brew install grep"
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echo "On macOS, you may want to try: brew install grep"
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exit 1
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exit 1
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fi
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fi
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# -----
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# -----
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@ -95,124 +96,140 @@ debug_file() {
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# log
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# log
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log() {
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log() {
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echo "$(date "+%F %T%z") ${1}"
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echo "$(date "+%F %T%z") ${1}"
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}
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}
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# Clean up if someone hits ^c
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trap 'rm -r -f "${working_directory}"' EXIT
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trap 'rm -r -f "${working_directory}"' EXIT
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working_directory=`mktemp -d 2>/dev/null || mktemp -d -t 'mytmpdir'`
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working_directory=`mktemp -d 2>/dev/null || mktemp -d -t 'mytmpdir'`
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metadata_file="${working_directory}/metadata.txt"
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metadata_file="${working_directory}/metadata.txt"
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# -----
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# Inspect the AAX and extract the metadata associated with the file.
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save_metadata() {
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save_metadata() {
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local media_file
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local media_file
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media_file="$1"
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media_file="$1"
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ffprobe -i "$media_file" 2> "$metadata_file"
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ffprobe -i "$media_file" 2> "$metadata_file"
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debug "Metadata file $metadata_file"
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debug "Metadata file $metadata_file"
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debug_file "$metadata_file"
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debug_file "$metadata_file"
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}
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}
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# -----
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# Reach into the meta data and extract a specific value.
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# Note the white space clean up could be well cleaner.
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get_metadata_value() {
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get_metadata_value() {
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local key
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local key
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key="$1"
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key="$1"
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normalize_whitespace "$($GREP --max-count=1 --only-matching "${key} *: .*" "$metadata_file" | cut -d : -f 2- | sed -e 's#/##g;s/ (Unabridged)//' | tr -s '[:blank:]' ' ')"
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normalize_whitespace "$($GREP --max-count=1 --only-matching "${key} *: .*" "$metadata_file" | cut -d : -f 2- | sed -e 's#/##g;s/ (Unabridged)//' | tr -s '[:blank:]' ' ')"
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}
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}
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# -----
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# specific varient of get_metadata_value bitrate is important for transcoding.
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get_bitrate() {
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get_bitrate() {
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get_metadata_value bitrate | $GREP --only-matching '[0-9]\+'
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get_metadata_value bitrate | $GREP --only-matching '[0-9]\+'
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}
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}
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# -----
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# simple function to turn tabs and multiple spaces into a single space.
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normalize_whitespace() {
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normalize_whitespace() {
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echo $*
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echo $*
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}
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}
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# ========================================================================
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# ========================================================================
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# Main Transcode Loop
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# Main Transcode Loop
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for path
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for path
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do
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do
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log "Decoding ${path} with auth code ${auth_code}..."
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log "Decoding ${path} with auth code ${auth_code}..."
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# Check for Presense of Audiobook
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# Check for Presense of Audiobook
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if [[ ! -r "${path}" ]] ; then
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if [[ ! -r "${path}" ]] ; then
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echo "ERROR: Input Audiobook file $path missing"
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echo "ERROR: Input Audiobook file $path missing"
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exit 1
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exit 1
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fi
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fi
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save_metadata "${path}"
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# -----
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genre=$(get_metadata_value genre)
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# Make sure everything is a variable. Simplifying CMD interpretation
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artist=$(get_metadata_value artist)
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save_metadata "${path}"
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title=$(get_metadata_value title | sed 's/'\:'/'-\ '/g' | xargs -0)
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genre=$(get_metadata_value genre)
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if [ ! -z targetdir ] ; then
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artist=$(get_metadata_value artist)
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output_directory="${targetdir}/${genre}/${artist}/${title}"
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title=$(get_metadata_value title | sed 's/'\:'/'-\ '/g' | xargs -0)
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else
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if [ ! -z targetdir ] ; then
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output_directory="$(dirname "${path}")/${genre}/${artist}/${title}"
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output_directory="${targetdir}/${genre}/${artist}/${title}"
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fi
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else
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mkdir -p "${output_directory}"
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output_directory="$(dirname "${path}")/${genre}/${artist}/${title}"
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full_file_path="${output_directory}/${title}.${extension}"
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fi
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bitrate="$(get_bitrate)k"
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mkdir -p "${output_directory}"
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album_artist="$(get_metadata_value album_artist)"
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full_file_path="${output_directory}/${title}.${extension}"
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album="$(get_metadata_value album)"
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bitrate="$(get_bitrate)k"
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album_date="$(get_metadata_value date)"
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album_artist="$(get_metadata_value album_artist)"
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copyright="$(get_metadata_value copyright)"
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album="$(get_metadata_value album)"
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album_date="$(get_metadata_value date)"
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copyright="$(get_metadata_value copyright)"
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# Big long DEBUG output. Fully describes the settings used for transcoding. I could probably do this better.
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# Big long DEBUG output. Fully describes the settings used for transcoding. I could probably do this better.
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debug "$(printf '\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %sn%-18s: %s' title "${title}" auth_code "${auth_code}" mode "${mode}" path "${path}" codec "${codec}" bitrate "${bitrate}" artist "${artist}" album_artist "${album_artist}" album "${album}" album_date "${album_date}" genre "${genre}" copyright "${copyright}" full_file_path "${full_file_path}" metadata_file "${metadata_file}" working_directory "${working_directory}" )"
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debug "$(printf '\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %sn%-18s: %s' title "${title}" auth_code "${auth_code}" mode "${mode}" path "${path}" codec "${codec}" bitrate "${bitrate}" artist "${artist}" album_artist "${album_artist}" album "${album}" album_date "${album_date}" genre "${genre}" copyright "${copyright}" full_file_path "${full_file_path}" metadata_file "${metadata_file}" working_directory "${working_directory}" )"
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# This is the primary transcode. All the heavy lifting is here.
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# -----
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</dev/null ffmpeg -loglevel error -stats -activation_bytes "${auth_code}" -i "${path}" -vn -codec:a "${codec}" -ab ${bitrate} -map_metadata -1 -metadata title="${title}" -metadata artist="${artist}" -metadata album_artist="${album_artist}" -metadata album="${album}" -metadata date="${album_date}" -metadata track="1/1" -metadata genre="${genre}" -metadata copyright="${copyright}" "${full_file_path}"
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# This is the main work horse command. This is the primary transcoder.
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# This is the primary transcode. All the heavy lifting is here.
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</dev/null ffmpeg -loglevel error -stats -activation_bytes "${auth_code}" -i "${path}" -vn -codec:a "${codec}" -ab ${bitrate} -map_metadata -1 -metadata title="${title}" -metadata artist="${artist}" -metadata album_artist="${album_artist}" -metadata album="${album}" -metadata date="${album_date}" -metadata track="1/1" -metadata genre="${genre}" -metadata copyright="${copyright}" "${full_file_path}"
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log "Created ${full_file_path}."
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log "Created ${full_file_path}."
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# Grab the cover art if available.
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# Grab the cover art if available.
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cover_path="${output_directory}/cover.jpg"
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cover_path="${output_directory}/cover.jpg"
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log "Extracting cover into ${cover_path}..."
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log "Extracting cover into ${cover_path}..."
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</dev/null ffmpeg -loglevel error -activation_bytes "${auth_code}" -i "${path}" -an -codec:v copy "${cover_path}"
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</dev/null ffmpeg -loglevel error -activation_bytes "${auth_code}" -i "${path}" -an -codec:v copy "${cover_path}"
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# If we want multiple file we take the big mp3 and split it by chapter.
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# -----
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if [ "${mode}" == "chaptered" ]; then
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# OK now spit the file if that's what you want.
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# Playlist m3u support
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# If we want multiple file we take the big mp3 and split it by chapter.
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playlist_file="${output_directory}/${title}.m3u"
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if [ "${mode}" == "chaptered" ]; then
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log "Creating PlayList ${title}.m3u"
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# Playlist m3u support
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echo '#EXTM3U' > "${playlist_file}"
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playlist_file="${output_directory}/${title}.m3u"
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log "Creating PlayList ${title}.m3u"
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echo '#EXTM3U' > "${playlist_file}"
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chaptercount=$($GREP -Pc "Chapter.*start.*end" $metadata_file)
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chaptercount=$($GREP -Pc "Chapter.*start.*end" $metadata_file)
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log "Extracting ${chaptercount} chapter files from ${full_file_path}..."
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log "Extracting ${chaptercount} chapter files from ${full_file_path}..."
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chapternum=1
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chapternum=1
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while read -r -u9 first _ _ start _ end
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while read -r -u9 first _ _ start _ end
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do
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do
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if [[ "${first}" = "Chapter" ]]
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if [[ "${first}" = "Chapter" ]]; then
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then
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read -r -u9 _
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read -r -u9 _
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read -r -u9 _ _ chapter
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read -r -u9 _ _ chapter
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chapter_title="${title} - $(printf %0${#chaptercount}d $chapternum) ${chapter}"
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chapter_title="${title} - $(printf %0${#chaptercount}d $chapternum) ${chapter}"
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chapter_file="${output_directory}/${chapter_title}.${extension}"
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chapter_file="${output_directory}/${chapter_title}.${extension}"
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# the ID3 tags must only be specified for *.mp3 files,
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# the ID3 tags must only be specified for *.mp3 files,
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# the other container formats come with their own
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# the other container formats come with their own
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# tagging mechanisms.
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# tagging mechanisms.
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id3_version_param=""
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id3_version_param=""
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if test "${extension}" = "mp3"; then
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if test "${extension}" = "mp3"; then
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id3_version_param="-id3v2_version 3"
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id3_version_param="-id3v2_version 3"
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fi
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fi
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# Big Long chapter debug I could probably do this better.
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# Big Long chapter debug I could probably do this better.
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debug "$(printf '\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s' cover_path "${cover_path}" start "${start%?}" end "${end}" id3_version_param "${id3_version_param}" chapternum "${chapternum}" chapter_title "${chapter_title}" chapter_file "${chapter_file}" )"
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debug "$(printf '\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s\n%-18s: %s' cover_path "${cover_path}" start "${start%?}" end "${end}" id3_version_param "${id3_version_param}" chapternum "${chapternum}" chapter_title "${chapter_title}" chapter_file "${chapter_file}" )"
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# Extract chapter by time stamps start and finish of chapter.
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# Extract chapter by time stamps start and finish of chapter.
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</dev/null ffmpeg -loglevel error -stats -i "${full_file_path}" -i "${cover_path}" -ss "${start%?}" -to "${end}" -map 0:0 -map 1:0 -acodec copy ${id3_version_param} \
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</dev/null ffmpeg -loglevel error -stats -i "${full_file_path}" -i "${cover_path}" -ss "${start%?}" -to "${end}" -map 0:0 -map 1:0 -acodec copy ${id3_version_param} \
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-metadata:s:v title="Album cover" -metadata:s:v comment="Cover (Front)" -metadata track="${chapternum}" -metadata title="${chapter_title}" \
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-metadata:s:v title="Album cover" -metadata:s:v comment="Cover (Front)" -metadata track="${chapternum}" -metadata title="${chapter_title}" \
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"${chapter_file}"
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"${chapter_file}"
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duration=$(echo "${end} - ${start%?}" | bc)
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# OK lets get what need for the next chapter in the Playlist m3u file.
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echo "#EXTINF:${duration%.*},${title} - ${chapter}" >> "${playlist_file}"
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duration=$(echo "${end} - ${start%?}" | bc)
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echo "${chapter_title}.${extension}" >> "${playlist_file}"
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echo "#EXTINF:${duration%.*},${title} - ${chapter}" >> "${playlist_file}"
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chapternum=$((chapternum + 1 ))
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echo "${chapter_title}.${extension}" >> "${playlist_file}"
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fi
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chapternum=$((chapternum + 1 ))
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done 9< "$metadata_file"
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fi
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rm "${full_file_path}"
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done 9< "$metadata_file"
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log "Done creating chapters. Chaptered files contained in ${output_directory}."
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rm "${full_file_path}"
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fi
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log "Done creating chapters. Chaptered files contained in ${output_directory}."
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fi
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log "Done. ${title}"
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log "Done. ${title}"
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rm "${metadata_file}"
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rm "${metadata_file}"
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done
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done
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