Warning: This script could screw things up. If you don’t feel comfortable with shell scripts, this might not be for you.
#!/bin/bash
set -e # exit script if control-c is used
USAGE="Usage: convert_to_aac.sh source_dir destination_dir num_processes"
# --- Options processing -------------------------------------------
if [ $# == 0 ] ; then
echo $USAGE
exit 1;
fi
PROCESSES=${3:-2}
# Convert relative path to absolute. Also remove trailing slash
export SOURCE_DIR="$(cd "$(dirname "$1")"; pwd)/$(basename "$1")"
SOURCE_DIR=$(dirname "$SOURCE_DIR/temp") # this fixes . and ./
export DESTINATION_DIR="$(cd "$(dirname "$2")"; pwd)/$(basename "$2")"
DESTINATION_DIR=$(dirname "$DESTINATION_DIR/temp") # this fixes . and ./
convertfile() {
FILE=$1
ORIG_DIR=$(dirname "$FILE")
# Get basename and remove extension
BASE=$(basename "$FILE") # get filename
BASE=${BASE%.*} # remove extension from filename
NEW_DIR=${ORIG_DIR/$SOURCE_DIR/$DESTINATION_DIR}
mkdir -p "$NEW_DIR"
NEW_FILE="$NEW_DIR/$BASE.m4a"
if [ ! -f "$NEW_FILE" ]; then
echo "Converting $FILE to $NEW_FILE"
afconvert "$FILE" -o "$NEW_FILE" -q 127 -b 192000 -f m4af -d aac
fi
}
export -f convertfile
find "$SOURCE_DIR" \( -iname '*.flac' -or -iname '*.m4a' \) -type f -print0|xargs -0 -P $PROCESSES -I % bash -c 'convertfile "%"'
Digital Audio Playlist:
https://www.youtube.com/playlist?list=PLErU2HjQZ_ZPoumpVxfXEm8-ZiEKlMjnM