Use ffmpeg to split file by chapters. Python version and bash version

ffmpegchapters-explicit.sh

#!/bin/bash
# m4v and mp4 video, Chapter Marker splitter
# May be particularly good with final cut DVD chapter markers
# This standard seems to be popular in MP3's... cant find the official spec

#     Chapter #0:0: start 0.000000, end 1290.013333
#     Metadata:
#       title           : 3.4 - Rigging and Replacement

# http://linuxcommand.org/lc3_man_pages/readh.html

# based on
# Author: http://crunchbang.org/forums/viewtopic.php?id=38748#p414992
# m4bronto

while [ $# -gt 0 ]; do
filename=$(basename "$1")
extension="${filename##*.}"
basedir="${1%$filename}"
dir="${basedir}chapters for ${filename%.$extension}/"

mkdir "$dir"
ffmpeg -i "$1" 2> "/tmp/vidsplit.txt"

while read -r first _ _ start _ end; do
  if [[ $first = Chapter ]]; then
    read  # discard line with Metadata:
    read _ _ chapter

    ffmpeg -i "$1" -ss "${start%?}" -to "$end" -codec copy -f mp4 "${dir}$chapter.$extension" </dev/null

  fi
done < "/tmp/vidsplit.txt"

find "${dir}.." -type d -empty -delete

shift
done