Yet Another FLAC to MP3 script

flac2mp3_320k.sh

#!/bin/bash
#
# Copyright 2008 Octavio Ruiz
# Distributed under the terms of the GNU General Public License v3
# $Header: $
#
# Yet Another FLAC to MP3 script
#
# Author:
# Octavio Ruiz (Ta^3) <[email protected]>
# Thanks:
# Those comments at:
# http://www.linuxtutorialblog.com/post/solution-converting-flac-to-mp3
# WebPage:
# https://github.com/tacvbo/yaflac2mp3/tree
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY. YOU USE AT YOUR OWN RISK. THE AUTHOR
# WILL NOT BE LIABLE FOR DATA LOSS, DAMAGES, LOSS OF PROFITS OR ANY
# OTHER KIND OF LOSS WHILE USING OR MISUSING THIS SOFTWARE.
# See the GNU General Public License for more details.
#
# Modified by woohoo
#
# Additional modifications by dentex:
# 2018/07/05: ?
# 2022/12/30: add proper zenity progress
#
# you need zenity package for notifications.
# please note that you can put this script in ~/.local/share/nemo/scripts
# and it will show up in right-click menu in any folder in cinnamon.
#
# modify the lame options to your preference example change -b 320 to -b 128 or -b 192 or -b 256
# LAME_OPTS="--vbr-new -V 0 -b 256"
# LAME_OPTS="-V 0 --vbr-new"

LAME_OPTS="-b 320 -h --cbr"

old_IFS=${IFS}
IFS='
'

# when running from nemo-scripts, it's useful to find the current folder
base="`echo $NEMO_SCRIPT_CURRENT_URI | cut -d'/' -f3- | sed 's/%20/ /g'`"
if [ -z "$NEMO_SCRIPT_SELECTED_FILE_PATHS" ]; then
  dir="$base"
else
  while [ ! -z "$1" -a ! -d "$base/$1" ]; do shift; done
  dir="$base/$1"
fi

if [ "$dir" != "" ]; then
  cd "$dir"
fi

# Create a temp file
tmp_file=$(mktemp)

id3v2=$(which id3v2)

# Populate array of files to process
readarray -d $'\0' files < <(find . -type f -regex '^.+\.flac$' -print0)

# Init progress vars
file_num=${#files[@]}
pr=0
(( i_pr=100/file_num ))

declare -i processed_files=0

# Loop through files
for fn in "${files[@]}"; do
  vars=( `metaflac --no-utf8-convert --export-tags-to=- "${fn}"` )

  for N_vars in ${!vars[@]}; do
    export "$(echo "${vars[${N_vars}]%=*}" | tr [:upper:] [:lower:])=${vars[${N_vars}]#*=}"
  done

  dest=`echo "$fn"|sed -e 's/\.flac$/\.mp3/'`
  
  # print zenity text
  echo "# processing $dest ..."

  # print zenity progress
  echo $pr

  flac -dc "$fn" |\
    lame --ignore-tag-errors --add-id3v2 ${LAME_OPTS} \
        ${artist:+--ta} ${artist} \
        ${tracknumber:+--tn} ${tracknumber} \
        ${title:+--tt} ${title} \
        ${album:+--tl} ${album} \
        ${date:+--ty} ${date} \
        ${genre:+--tg} ${genre} \
        ${comment:+--tc} ${comment} \
        - $dest

    [[ -x ${id3v2} ]] && ${id3v2} \
        ${artist:+--artist} ${artist} \
        ${tracknumber:+--track} ${tracknumber} \
        ${title:+--song} ${title} \
        ${album:+--album} ${album} \
        ${date:+--year} ${date} \
        ${genre:+--genre} ${genre} \
        ${comment:+--comment} ${comment} \
        $dest
        
  # increment zenity progress for next iteration
  (( pr=pr+i_pr ))

  # keep track of processed file number
  (( processed_files++ ))
  echo $processed_files > $tmp_file

done | tee >(zenity --height 150 --width 300 --progress --title="processing files ..." --auto-close --auto-kill)

zenity --notification --text "Finished converting flac to mp3. ${IFS}Processed $(cat $tmp_file) files."

IFS=${old_IFS}

rm -f "$tmp_file"