AAXtoMP3/AAXtoMP3.sh

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#!/usr/bin/env bash
AUTHCODE=$1
shift
while [ $# -gt 0 ]; do
FILE=$1
echo "Decoding $FILE with AUTHCODE $AUTHCODE..."
ffmpeg -i "$FILE" 2> tmp.txt
TITLE=`grep -a -m1 -h -r "title" tmp.txt | head -1 | cut -d: -f2- | xargs`
TITLE=`echo $TITLE | sed -r 's/\(Unabridged\)//' | xargs`
ARTIST=`grep -a -m1 -h -r "artist" tmp.txt | head -1 | cut -d: -f2- | xargs`
GENRE=`grep -a -m1 -h -r "genre" tmp.txt | head -1 | cut -d: -f2- | xargs`
BITRATE=`grep -a -m1 -h -r "bitrate" tmp.txt | head -1 | rev | cut -d: -f 1 | rev | egrep -o [0-9]+ | xargs`
BITRATE="${BITRATE}k"
OUTPUT="$TITLE"
OUTPUT_DIR="${GENRE}/${ARTIST}/${TITLE}"
ffmpeg -v error -stats -activation_bytes $AUTHCODE -i "${FILE}" -vn -c:a libmp3lame -ab $BITRATE "${OUTPUT}.mp3"
echo "Created ${OUTPUT}.mp3."
echo "Extracting chaptered mp3 files from ${OUTPUT}.mp3..."
mkdir -p "${OUTPUT_DIR}"
while read -r first _ _ start _ end; do
if [[ $first = Chapter ]]; then
read
read _ _ chapter
ffmpeg -v error -stats -i "${OUTPUT}.mp3" -ss "${start%?}" -to "$end" -acodec copy "${OUTPUT} - $chapter.mp3" < /dev/null
mv "${OUTPUT} - $chapter.mp3" "${OUTPUT_DIR}"
fi
done < tmp.txt
mv "${OUTPUT}.mp3" "${OUTPUT_DIR}"
echo "Done creating chapters. Single file and chaptered files contained in ${OUTPUT_DIR}."
rm tmp.txt
shift
done