Mac OS X – Terminal – FFMPEG – Convert Music Files FLAC to MP3 or MP4 to MP3

Prerequisite: Homebrew

Essentially you can convert just about anything but this script is specific to FLAC to MP3

<br>
brew install ffmpeg --with-vpx --with-vorbis --with-libvorbis --with-vpx --with-vorbis --with-theora --with-libogg --with-libvorbis --with-gpl --with-version3 --with-nonfree --with-postproc --with-libaacplus --with-libass --with-libcelt --with-libfaac --with-libfdk-aac --with-libfreetype --with-libmp3lame --with-libopencore-amrnb --with-libopencore-amrwb --with-libopenjpeg --with-openssl --with-libopus --with-libschroedinger --with-libspeex --with-libtheora --with-libvo-aacenc --with-libvorbis --with-libvpx --with-libx264 --with-libxvid<br>

<br>
#!/bin/sh</p>
<p>clear</p>
<p># Declare main variables - start<br>
declare pkg="ffmpeg"<br>
declare MusicDir=$1<br>
# Declare main variables - stop</p>
<p>if [ -z ${1+x} ]; then<br>
    echo "Music Directory is unset"<br>
    echo "Example: sh ConvertMusic.sh ~/Music"<br>
    exit 0<br>
fi</p>
<p>if brew list -1 | grep -q "^$pkg\$"; then<br>
    echo "Package '$pkg' is installed"<br>
else<br>
    echo "Package '$pkg' is not installed"<br>
    brew install $pkg<br>
fi</p>
<p>cd $MusicDir</p>
<p>for f in *.flac;<br>
    do<br>
        echo "Processing:\n$f"<br>
        ffmpeg -v quiet -i "$f" -ab 320k -map_metadata 0 -id3v2_version 3 "${f%.flac}.mp3";<br>
        echo "Processed:\n$f"<br>
        echo "Deleting:\n$f"<br>
        rm -f "$f"<br>
        echo "Moving MP3:\n${f%.flac}.mp3"<br>
        mv "${f%.flac}.mp3" /Volumes/4TB/MusicFiles/mp3<br>
done<br>

To convert from MP4 to MP3 the code below will work

for f in *.mp4; do
        /usr/local/Cellar/ffmpeg/2.5.4/bin/ffmpeg -i "$f" "$f.mp3"
#        /usr/bin/afconvert -d '.mp3' -f MPG3 "$f" -o "$f.mp3"
        echo "$f converted"
done