Splits a media file (such as mkv) into flac files, one file per chapter

media-to-flac-split.sh

#!/bin/bash
# Splits a media file (such as mkv) into flac files, one file per chapter
if [[ $# -ne 2 ]] ; then
    echo 'Syntax: media-to-flac-split.sh input-file.mkv stream-number'
    exit 1
fi
DIRECTORY="${1//[\. \"\']/-}-stream-$2"
mkdir -p $DIRECTORY
ffprobe -i $1 2>&1 | grep "Chapter #" | sed -E "s/ *Chapter #[0-9]+.([0-9]+): start ([0-9]+.[0-9]+), end ([0-9]+.[0-9]+)/-map 0:$2 -ss \2 -to \3 -metadata track=\"\1\" $DIRECTORY\/track-\1.flac/" | xargs ffmpeg -y -i $1