Split audiobook into files containing individual chapters

absplit.sh

#!/bin/bash
# Description: Modified version of script from https://unix.stackexchange.com/a/612124
# Requires: ffmpeg, jq
# Author: Hasan Arous
# License: MIT

in="$1"
out="$2"
splits=""
while read start end title; do
	splits="$splits -c copy -ss $start -to $end ${out}_$title.m4a"
done <<<$(ffprobe -i "$in" -print_format json -show_chapters \
			  | jq -r '.chapters[] | .start_time + " " + .end_time + " " + (.tags.title | sub(" "; "_"))')

ffmpeg -i "$in" $splits