auto split video into chapters

split-chapter.py

#!/usr/bin/python

import json, os

tracklist = [
	"bird funeral [Introduction]",
	"This is the happiness peace committee. [Introduction]",
	"Unhappy Refrain [two of the switching]",
	"Sugar Bits [switching of two]",
	"Gakuen × ∀ssassinatioИ [two of the switching]",
	"Immorality of flower [two of the switching]",
	"Mad Lovers [two of the switching]",
	"Secret police [switching of two]",
	"Cantarella [Michiyuki]",
	"Monday, shadow My Hana [Michiyuki]",
	"Chaining Intention [four of the switching]",
	"deep sea girl [switching of four]",
	"Halo _ Hawayu [four of the switching]",
	"1_6 ~out of gravity~ [four of the switching]",
	"Crescent rider [switching of four]",
	"Tell Your World [Switching of four]",
	"One Night Girl [finale]",
	"Thousand Sakura [finale]",
	"SWEET MEMORIES [finale]",
	"Orange intersection [finale]"]

# to generate the json file, use ffprobe.
# ffprobe -v error -show_chapters -print_format json > chapters.json
with open("chapters.json","r") as f:
	js = json.load(f)
	counter = 0
	for each in js["chapters"]:
		os.system(f"ffmpeg -v error -ss {each['start_time']} -i in.mkv -to {each['end_time']} -vn -c:a libmp3lame -q:a 3 -compression_level 0 -threads 2 -y 'chapters/{tracklist[x]}.mp3'")
		counter += 1
		print(f"{counter:02d} '{tracklist[x]}'")