MacOs command line script : use VLC to transcode to mp3

vlc

#! /usr/bin/env bash
outputdirectory="`dirname ~/Music`/Music/VLCout"
albumname=""
acodec="mpga"
mux="mpeg1"
ext=".mp3"
directoryAsAlbumName=""
foldDirectoryNames=""

function showhelp {

    echo "Batch convert to mp3 or other codec using VLC.

    Usage:

    vlc [-a AlbumNamePrefix] [-d | -D] [-o OutputDirectory] [-m mux] [e .extension]  inputfile ...

    OutputDirectory defaults to $outputdirectory/

    If -a, -d or -D are specified, then output will go to $outputdirectory/<AlbumName>/

        Where AlbumName will be :

        if -a is specified without -d or -D, then \"AlbumNamePrefix\"
        if -d is specified then \"AlbumNamePrefix inputfileParentFolderName\"
        if -D is specified then \"AlbumNamePrefix inputfileRelativePathWithSlashesReplacedBySpaces\"

    mux defaults to mpeg1

    ext defaults to mp3

    e.g.

    vlc -a "MP3" -d -o ~  "Prefab Sprout/Steve McQueen/*.m*"

    will transcode to mp3 files in to the directory "~/MP3 Prefab Sprout Steve McQueen/"

    "
}

if [ -z "$*" ]; then showhelp ; exit 0 ; fi

# --------------- Parse options -----------------
OPTIND=1 # Reset in case getopts has been used previously in the shell.
while getopts "h?a:dDo:m:e:" opt; do
    case "$opt" in
    h|\?)
        showhelp
        exit 0
        ;;
    a)  albumname=$OPTARG
        ;;
    d)  directoryAsAlbumName=Y
        ;;
    D)  directoryAsAlbumName=Y
        foldDirectoryNames=Y
        ;;
    o)  outputdirectory=$OPTARG
        ;;
    e)  ext=$OPTARG
        didSpecifyExt=Y
        ;;
    m)  
        mux=$OPTARG
        if [ -z "$didSpecifyExt" ] ; then ext=".$OPTARG" ; fi
        ;;
    esac
done
shift $((OPTIND-1))
[ "$1" = "--" ] && shift

if [[   -z "$directoryAsAlbumName" && ! -z "$albumname" ]] ; then outputdirectory="$outputdirectory/$albumname" ; fi
if [[ ! -z "$directoryAsAlbumName" && ! -z "$albumname" ]] ; then albumname="$albumname " ; fi

# --------------- End Parse options -----------------

vlc="/Applications/VLC.app/Contents/MacOS/VLC"


if [ ! -e "$vlc" ]; then echo "Command '$vlc' does not exist" ; exit 1 ; fi

OIFS=$IFS
IFS=$'\n'  
for file in "$@"; do

    new="$(basename "$file" | sed -E 's@\.[0-9A-Za-z]+$@@' | sed -E "s@[:?/\\]@-@g" | sed -E "s@['\"]@@g" | sed -E 's@[ ]@\ @')$ext"
    if [ ! -z "$directoryAsAlbumName" ] ; then 
        fromdir="$(dirname $file | sed -E 's@[:?\\]@-@g' | sed -E "s@['\"]@@g")"
        if [ ! -z "$foldDirectoryNames" ] ; then 
            fromdir="$(echo "$fromdir" | sed -E 's@/@\ @g')"
        fi
        dst="$outputdirectory/$albumname$fromdir/$new"
        mkdir -p "$outputdirectory/$albumname$fromdir"
    else
        dst="$outputdirectory/$new"
        mkdir -p $outputdirectory
    fi


    echo "=> Transcoding '$file' to $dst ... "

    $vlc -v -I dummy $file \
        --sout "#transcode{acodec=$acodec}:standard{mux=$mux,dst=$dst,access=file}" \
        vlc://quit 

    ls -lh "$file" "$dst/$new"
    echo
done
IFS=$OIFS

Instructions for non-techies

1. Find a techie to help you.
2. Download the raw file by pressing the Raw button and saving the file.

• If using Safari, don't save a 'Web archive' save as source text.
• If using Safari, don't save with a .txt on the end, save with just the name vlc

3. Open a command line (see point 1)

mv ~/Download/vlc /usr/local/bin/
chmod a+x /usr/local/bin/vlc
vlc -?