Set ID3 tags of MP3 files from file names and directory names.

file2utf8tag.sh

#!/bin/bash
#
# If you have munch of MP3's in a folder with filenames corresponding
# to the titles of songs, but ID3 tags are missing or misformed (for
# example, coming from Windows with cp1251 codapage, but you need
# UTF8), this script will read filenames and set ID3 tags
# correspondingly.
#
# cd to the directory with mp3 files and execute script
# there. Directories on the upper level should have names:
#
# mp3 files directory name: disc name
# directory 1 level up: author
#
# Convention for directory names is:
#
# ├── Author (composed
# │   ├── Disc title
# │   │   ├── 01 Track 1 <--- execute script in songs directory
# │   │   ├── 02 Track 2
# │   │   ├── 03 Track 3
#
# Requiremenets: uses eyeD3 Python script
#
# Author: Dmytro Kovalov, 2014

doit () {
    FILE="$*"

     TITLE=$(/usr/bin/basename "$FILE" .mp3)

     NUMBER=$(echo $TITLE | awk '$1 ~ /[0-9]+/ {print $1}')
     if [ ! -z $NUMBER ]; then
         TITLE=$(echo $TITLE | sed "s/${NUMBER}//")
         NUMBER_OPT="--track=$NUMBER"
     fi

     DIR1=$(dirname "$FILE")
     DISC=$(basename "$DIR1")

     DIR2=$(dirname "$DIR1")
     ARTIST=$(basename "$DIR2")

     echo ------------------------------------------------------------------
     echo $TITLE
     echo $DISC
     echo $ARTIST
     echo $NUMBER

     eyeD3 --to-v2.4 --set-encoding=utf8 --title="$TITLE" --artist="$ARTIST" --album="$DISC" $NUMBER_OPT "$FILE"

     echo ==================================================================
     echo
}

export -f doit
/usr/bin/find "$(pwd)" -name \*.mp3 -exec bash -c 'doit "{}"'  \;