mirror of
https://github.com/KrumpetPirate/AAXtoMP3.git
synced 2024-11-18 03:08:57 +01:00
468 lines
19 KiB
Bash
Executable File
468 lines
19 KiB
Bash
Executable File
#!/usr/bin/env bash
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# ========================================================================
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# Command Line Options
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# Usage Synopsis.
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usage=$'\nUsage: AAXtoMP3 [--flac] [--aac] [--opus ] [--single] [--chaptered]\n[-e:mp3] [-e:m4a] [-e:m4b] [--authcode <AUTHCODE>]\n[--output_dir <PATH>] [--complete_dir <PATH>] [--validate]\n{FILES}\n'
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codec=libmp3lame # Default encoder.
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extension=mp3 # Default encoder extention.
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mode=chaptered # Multi file output
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auth_code= # Required to be set via file or option.
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targetdir= # Optional output location. Note default is basedir of AAX file.
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completedir= # Optional location to move aax files once the decoding is complete.
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container=mp3 # Just in case we need to change the container. Used for M4A to M4B
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VALIDATE=0 # Validate the input aax file(s) only. No Transcoding of files will occur
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DEBUG=0 # Default off, If set extremely verbose output.
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# -----
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# Code tip Do not have any script above this point that calls a function or a binary. If you do
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# the $1 will no longer be a ARGV element. So you should only do basic variable setting above here.
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#
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# Process the command line options. This allows for un-ordered options. Sorta like a getops style
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while true; do
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case "$1" in
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# Flac encoding
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-f | --flac ) codec=flac; extension=flac; mode=single; container=flac; shift ;;
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# Apple m4a music format.
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-a | --aac ) codec=copy; extension=m4a; mode=single; container=m4a; shift ;;
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# Ogg Format
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-o | --opus ) codec=libopus; extension=ogg; container=flac; shift ;;
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# If appropriate use only a single file output.
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-s | --single ) mode=single; shift ;;
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# If appropriate use only a single file output.
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-c | --chaptered ) mode=chaptered; shift ;;
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# This is the same as --single option.
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-e:mp3 ) codec=libmp3lame; extension=mp3; mode=single; container=mp3; shift ;;
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# Identical to --acc option.
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-e:m4a ) codec=copy; extension=m4a; mode=single; container=m4a; shift ;;
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# Similiar to --aac but specific to audio books
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-e:m4b ) codec=copy; extension=m4a; mode=single; container=m4b; shift ;;
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# Change the working dir from AAX directory to what you choose.
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-t | --target_dir ) targetdir="$2"; shift 2 ;;
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# Move the AAX file to a new directory when decoding is complete.
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-C | --complete_dir ) completedir="$2"; shift 2 ;;
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# Authorization code associate with the AAX file(s)
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-A | --authcode ) auth_code="$2"; shift 2 ;;
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# Extremely verbose output.
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-d | --debug ) DEBUG=1; shift ;;
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# Validate ONLY the aax file(s) No transcoding occures
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-V | --validate ) VALIDATE=1; shift ;;
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# Command synopsis.
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-h | --help ) printf "$usage" $0 ; exit ;;
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# Standard flag signifying the end of command line processing.
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-- ) shift; break ;;
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# Anything else stops command line processing.
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* ) break ;;
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esac
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done
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# -----
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# Empty argv means we have nothing to do so lets bark some help.
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if [ "$#" -eq 0 ]; then
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printf "$usage" $0
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exit 1
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fi
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# Setup safer bash script defaults.
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set -o errexit -o noclobber -o nounset -o pipefail
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# ========================================================================
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# Utility Functions
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# -----
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# debug
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# debug "Some longish message"
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debug() {
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if [ $DEBUG == 1 ] ; then
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echo "$(date "+%F %T%z") DEBUG ${1}"
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fi
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}
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# -----
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# debug dump contents of a file to STDOUT
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# debug "<full path to file>"
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debug_file() {
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if [ $DEBUG == 1 ] ; then
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echo "$(date "+%F %T%z") DEBUG"
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echo "=Start=========================================================================="
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cat "${1}"
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echo "=End============================================================================"
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fi
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}
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# -----
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# debug dump a list of internal script variables to STDOUT
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# debug_vars "Some Message" var1 var2 var3 var4 var5
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debug_vars() {
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if [ $DEBUG == 1 ] ; then
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msg="$1"; shift ; # Grab the message
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args=("$@") # Grab the rest of the args
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# determine the length of the longest key
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l=0
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for (( n=0; n<${#args[@]}; n++ )) ; do
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(( "${#args[$n]}" > "$l" )) && l=${#args[$n]}
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done
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# Print the Debug Message
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echo "$(date "+%F %T%z") DEBUG ${msg}"
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echo "=Start=========================================================================="
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# Using the max length of a var name we dynamically create the format.
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fmt="%-"${l}"s = %s\n"
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for (( n=0; n<${#args[@]}; n++ )) ; do
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eval val="\$${args[$n]}" ; # We save off the value of the var in question for ease of coding.
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echo "$(printf "${fmt}" ${args[$n]} "${val}" )"
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done
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echo "=End============================================================================"
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fi
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}
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# -----
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# log
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log() {
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echo "$(date "+%F %T%z") ${1}"
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}
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# -----
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# Print out what we have already after command line processing.
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debug_vars "Command line options as set" codec extension mode container targetdir completedir auth_code
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# ========================================================================
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# Variable validation
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# -----
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# Detect which annoying version fo grep we have
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GREP=$(grep --version | grep -q GNU && echo "grep" || echo "ggrep")
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if ! [[ $(type -P "$GREP") ]]; then
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echo "$GREP (GNU grep) is not in your PATH"
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echo "Without it, this script will break."
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echo "On macOS, you may want to try: brew install grep"
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exit 1
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fi
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# -----
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# Detect ffmpeg and ffprobe
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if [[ "x$(type -P ffmpeg)" == "x" ]]; then
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echo "ERROR ffmpeg was not found on your env PATH variable"
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echo "Without it, this script will break."
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echo "INSTALL:"
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echo "MacOS: brew install ffmpeg"
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echo "Ubuntu: sudo apt-get update; sudo apt-get install ffmpeg libav-tools x264 x265"
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echo "RHEL: yum install ffmpeg"
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exit 1
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fi
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# -----
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# Detect ffmpeg and ffprobe
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if [[ "x$(type -P ffprobe)" == "x" ]]; then
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echo "ERROR ffprobe was not found on your env PATH variable"
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echo "Without it, this script will break."
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echo "INSTALL:"
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echo "MacOS: brew install ffmpeg"
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echo "Ubuntu: sudo apt-get update; sudo apt-get install ffmpeg libav-tools x264 x265"
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echo "RHEL: yum install ffmpeg"
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exit 1
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fi
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# -----
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# Detect if we need mp4art for cover additions to m4a & m4b files.
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if [[ "x${extension}" == "xm4a" && "x$(type -P mp4art)" == "x" ]]; then
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echo "WARN mp4art was not found on your env PATH variable"
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echo "Without it, this script will not be able to add cover art to"
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echo "m4b files. Note if there are no other errors the AAXtoMP3 will"
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echo "continue. However no cover art will be added to the output."
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echo "INSTALL:"
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echo "MacOS: brew install mp4v2"
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echo "Ubuntu: sudo apt-get install mp4v2-utils"
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fi
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# -----
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# Obtain the authcode from either the command line, local directory or home directory.
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# See Readme.md for details on how to aquire your personal authcode for your personal
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# audible AAX files.
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if [ -z $auth_code ]; then
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if [ -r .authcode ]; then
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auth_code=`head -1 .authcode`
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elif [ -r ~/.authcode ]; then
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auth_code=`head -1 ~/.authcode`
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fi
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fi
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# No point going on if no authcode found.
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if [ -z $auth_code ]; then
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echo "ERROR Missing authcode"
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echo "$usage"
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exit 1
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fi
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# -----
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# Check the target dir for if set if it is writable
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if [[ "x${targetdir}" != "x" ]]; then
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if [[ ! -w "${targetdir}" || ! -d "${targetdir}" ]] ; then
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echo "ERROR Target Directory does not exist or is not writable: \"$targetdir\""
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echo "$usage"
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exit 1
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fi
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fi
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# -----
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# Check the target dir for if set if it is writable
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if [[ "x${completedir}" != "x" ]]; then
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if [[ ! -w "${completedir}" || ! -d "${completedir}" ]] ; then
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echo "ERROR Complete Directory does not exist or is not writable: \"$completedir\""
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echo "$usage"
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exit 1
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fi
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fi
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# -----
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# Clean up if someone hits ^c or the script exits for any reason.
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trap 'rm -r -f "${working_directory}"' EXIT
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# -----
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# Set up some basic working files ASAP. Note the trap will clean this up no matter what.
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working_directory=`mktemp -d 2>/dev/null || mktemp -d -t 'mytmpdir'`
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metadata_file="${working_directory}/metadata.txt"
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# -----
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# Validate the AAX and extract the metadata associated with the file.
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validate_aax() {
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local media_file
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media_file="$1"
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# Test for existance
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if [[ ! -r "${media_file}" ]] ; then
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log "ERROR File NOT Found: ${media_file}"
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return
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else
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if [[ "${VALIDATE}" == "1" ]]; then
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log "Test 1 SUCCESS: ${media_file}"
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fi
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fi
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# Clear the errexit value we want to capture the output of the ffprobe below.
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set +e errexit
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# Take a look at the aax file and see if it is valid.
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output="$(ffprobe -loglevel warning -activation_bytes ${auth_code} -i "${media_file}" 2>&1)"
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# If invalid then say something.
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if [[ $? != "0" ]] ; then
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# No matter what lets bark that something is wrong.
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log "ERROR: Invalid File: ${media_file}"
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elif [[ "${VALIDATE}" == "1" ]]; then
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# If the validate option is present then lets at least state what is valid.
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log "Test 2 SUCCESS: ${media_file}"
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fi
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# This is a big test only performed when the --validate swicth is passed.
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if [[ "${VALIDATE}" == "1" ]]; then
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output="$(ffmpeg -hide_banner -activation_bytes ${auth_code} -i "${media_file}" -vn -f null - 2>&1)"
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if [[ $? != "0" ]] ; then
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log "ERROR: Invalid File: ${media_file}"
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else
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log "Test 3 SUCCESS: ${media_file}"
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fi
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fi
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# Dump the output of the ffprobe command.
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debug "$output"
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# Turn it back on. ffprobe is done.
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set -e errexit
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}
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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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local media_file
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media_file="$1"
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ffprobe -i "$media_file" 2> "$metadata_file"
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debug "Metadata file $metadata_file"
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debug_file "$metadata_file"
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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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# This is a long pipe of transforms.
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# This finds the first occurance of the key : value pair.
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get_metadata_value() {
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local key
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key="$1"
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# Find the key in the meta data file # Extract field value # Remove the following /'s "(Unabridged) <blanks> at start end and multiples.
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echo "$($GREP --max-count=1 --only-matching "${key} *: .*" "$metadata_file" | cut -d : -f 2- | sed -e 's#/##g;s/ (Unabridged)//;s/^[[:blank:]]\+//g;s/[[:blank:]]\+$//g' | sed 's/[[:blank:]]\+/ /g')"
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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_metadata_value bitrate | $GREP --only-matching '[0-9]\+'
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}
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# ========================================================================
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# Main Transcode Loop
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for aax_file
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do
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# Validate the input aax file. Note this happens no matter what.
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# It's just that if the validate option is set then we skip to next file.
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# If however vlaidate is not set and we proceed with the script any errors will
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# case the script to stop.
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validate_aax "${aax_file}"
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if [[ ${VALIDATE} == "1" ]] ; then
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# Don't bother doing anything else with this file.
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continue
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fi
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# -----
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# Make sure everything is a variable. Simplifying Command interpretation
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save_metadata "${aax_file}"
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genre=$(get_metadata_value genre)
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artist=$(get_metadata_value artist)
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title=$(get_metadata_value title | sed 's/'\:'/'-'/g' | sed 's/- /-/g' | xargs -0)
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if [ "x${targetdir}" != "x" ] ; then
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output_directory="${targetdir}/${genre}/${artist}/${title}"
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else
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output_directory="$(dirname "${aax_file}")/${genre}/${artist}/${title}"
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fi
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output_file="${output_directory}/${title}.${extension}"
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bitrate="$(get_bitrate)k"
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album_artist="$(get_metadata_value album_artist)"
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album="$(get_metadata_value album)"
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album_date="$(get_metadata_value date)"
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copyright="$(get_metadata_value copyright)"
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mkdir -p "${output_directory}"
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# Fancy declartion of which book we are decoding. Including the AUTHCODE.
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dashline="----------------------------------------------------"
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log "$(printf '\n----Decoding---%s%s--%s--' "${title}" "${dashline:${#title}}" "${auth_code}")"
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log "Source ${aax_file}"
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# Big long DEBUG output. Fully describes the settings used for transcoding.
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# Not this is a long debug command. It's not critical to operation. It's purely for people debugging
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# and coders wanting to extend the script.
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debug_vars "Book and Variable values" title auth_code mode aax_file container codec bitrate artist album_artist album album_date genre copyright output_file metadata_file working_directory
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# -----
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# This is the main work horse command. This is the primary transcoder.
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# This is the primary transcode. All the heavy lifting is here.
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debug 'ffmpeg -loglevel error -stats -activation_bytes "${auth_code}" -i "${aax_file}" -vn -codec:a "${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}" "${output_file}"'
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</dev/null ffmpeg -loglevel error -stats -activation_bytes "${auth_code}" -i "${aax_file}" -vn -codec:a "${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}" "${output_file}"
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log "Created ${output_file}."
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# -----
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# Grab the cover art if available.
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cover_file="${output_directory}/cover.jpg"
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log "Extracting cover into ${cover_file}..."
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</dev/null ffmpeg -loglevel error -activation_bytes "${auth_code}" -i "${aax_file}" -an -codec:v copy "${cover_file}"
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# -----
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# OK now spit the file if that's what you want.
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# If we want multiple file we take the big mp3 and split it by chapter.
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# Not all audio encodings make sense with multiple chapter outputs. See options section
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# for more detail
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if [ "${mode}" == "chaptered" ]; then
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# Playlist m3u support
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playlist_file="${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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# Determine the number of chapters.
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chaptercount=$($GREP -Pc "Chapter.*start.*end" $metadata_file)
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log "Extracting ${chaptercount} chapter files from ${output_file}..."
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chapternum=1
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while read -r -u9 first _ _ chapter_start _ chapter_end
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do
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if [[ "${first}" = "Chapter" ]]; then
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read -r -u9 _
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read -r -u9 _ _ chapter
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# The formating of the chapters names and the file names.
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# Chapter names are used in a few place.
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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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# 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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# tagging mechanisms.
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id3_version_param=""
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if test "${extension}" = "mp3"; then
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id3_version_param="-id3v2_version 3"
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fi
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# Big Long chapter debug
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debug_vars "Chapter Variables:" cover_file chapter_start chapter_end id3_version_param chapternum chapter_title chapter_file
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# Extract chapter by time stamps start and finish of chapter.
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# This extracts based on time stamps start and end.
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log "Spliting chapter ${chapternum} start:${chapter_start%?}(s) end:${chapter_end}(s)"
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</dev/null ffmpeg -loglevel quiet -nostats -i "${output_file}" -i "${cover_file}" -ss "${chapter_start%?}" -to "${chapter_end}" -map 0:0 -map 1:0 -acodec "${codec}" ${id3_version_param} \
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-metadata:s:v title="Album cover" -metadata:s:v comment="Cover (Front)" -metadata track="${chapternum}" -metadata title="${chapter_title}" \
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"${chapter_file}"
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# -----
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# OK lets get what need for the next chapter in the Playlist m3u file.
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# Playlist creation.
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duration=$(echo "${chapter_end} - ${chapter_start%?}" | bc)
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echo "#EXTINF:${duration%.*},${title} - ${chapter}" >> "${playlist_file}"
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echo "${chapter_title}.${container}" >> "${playlist_file}"
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chapternum=$((chapternum + 1 ))
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# ----
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# Add the cover art to m4a and m4b file types.
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if [[ ${extension} == "m4a" && $(type -P mp4art) ]]; then
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mp4art -q --add "${cover_file}" "${chapter_file}"
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log "Added cover art to ${chapter_title}"
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fi
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# ----
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# Detect if we are actuall m4b instead of m4a Then rename the file.
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if [[ ${extension} == "m4a" && ${container}="m4b" ]]; then
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mv "${chapter_file}" "${chapter_file/.m4a/.m4b}"
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fi
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fi
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done 9< "$metadata_file"
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# Clean up of working directoy stuff.
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rm "${output_file}"
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log "Done creating chapters for ${output_directory}."
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else
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# Perform file tasks on output file.
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# ----
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# Add the cover art to m4a and m4b file types.
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if [[ ${extension} == "m4a" && $(type -P mp4art) ]]; then
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mp4art -q --add "${cover_file}" "${output_file}"
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log "Added cover art to ${title}.${extension}"
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fi
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# ----
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# Detect if we are actuall m4b instead of m4a Then rename the file.
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if [[ ${extension} == "m4a" && ${container}="m4b" ]]; then
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mv "${output_file}" "${output_file/.m4a/.m4b}"
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fi
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fi
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# -----
|
|
# Announce that we have completed the transcode
|
|
log "Complete ${title}"
|
|
# Lastly get rid of any extra stuff.
|
|
rm "${metadata_file}"
|
|
|
|
# Move the aax file if the decode is completed and the --complete_dir is set to a valid location.
|
|
# Check the target dir for if set if it is writable
|
|
if [[ "x${completedir}" != "x" ]]; then
|
|
log "Moving Transcoded ${aax_file} to ${completedir}"
|
|
mv "${aax_file}" "${completedir}"
|
|
fi
|
|
|
|
done
|