split the given video/audio files by chapters using ffmpeg.

split-video-by-chapters.sh

#!/bin/sh -efu
# split the given video/audio files by chapters using ffmpeg.

for file; do
    ffprobe -print_format csv -show_chapters -- "$file" | cut -d, -f5,7,8 |
        while IFS=, read start end chapter; do
            ffmpeg -hide_banner -nostdin -ss "$start" -to "$end" -i "$file" \
                -c copy -map 0 -map_chapters -1 -- "${file%.*}-$chapter.${file##*.}"
        done
done