mora file to iOS-compatible m4a converter

mora2ios.sh

#!/usr/bin/env bash

# Reference:
# http://thousandleaves-project.com/blog/2012/10/drmフリーになったmora楽曲を再エンコードなしでiphonetouchで.html

mp4box=/Applications/Osmo4.app/Contents/MacOS/MP4Box

if [ $# -eq 0 ]; then
    echo "usage: mora2ios.sh file1 [file2 ...]"
    exit
fi

TEMPDIR=$(mktemp -d -t mora) || exit 1
for FILE in "$@"; do
    if "$mp4box" -quiet -noprog -info "$FILE" | grep -q -i error; then
        echo "error occured when converting $FILE" > /dev/stderr
    else
        "$mp4box" -quiet -noprog -set-meta NULL:tk=0 -out "$TEMPDIR/temp.m4a" "$FILE" > /dev/null
        mv "$FILE" "$FILE".orig
        mv "$TEMPDIR/temp.m4a" "${FILE%.*}.m4a"
    fi
done
rm -r "$TEMPDIR"