Convert FLAC to AAC | MP3

_audio.sh

function _audio() {
  case $1 in
    --mp3|*) local CODEC=libmp3lame;local FILENAME=mp3;;
    --aac) local CODEC=libvo_aacenc;local FILENAME=aac;;
  esac
  case $2 in
    256|*) local BITRATE=256k;;
    320) local BITRATE=320k;;
  esac
  
  for FILE in *.flac; do
    ffmpeg -i "$FILE" -c:a $CODEC -b:a $BITRATE "`basename "$FILE" .flac`.$FILENAME" || break;
  done
}

_audio

The quickest way to encode FLAC files to lossy formats using a simple I/O ffmpeg task.
You can install ffmpeg with brew install ffmpeg or sudo apt-get install ffmpeg

Options

• --mp3: Encodes the input as MP3 using lame.
• --aac: Encodes the input as AAC using libvo_aacenc. Due to the experimental nature of AAC encoding in ffmpeg this isn't really stable (no cover art e.g) and only to use if you really want it.
• 256: Second option that you can pass trough, encodes as 256kbps.
• 320: Same as above but 320kbps

Defaults

Just running _audio in a shell will output a 256kbps MP3. My personal preference is _audio --aac or audio 320

Disclaimer: this could probably be cleaner. Vars are scoped locally within the function.