Split media file with timeline.json by ffmpeg and python

ffmpeg-split.py

import ffmpeg
import argparse
import os
from datetime import timedelta
import csv

def parse_timeline(timeline_path):
	timeline = []
	with open(timeline_path, mode='r') as file:
		csvFile = csv.DictReader(file, delimiter=',')
		for lines in csvFile:
			timeline.append(lines)
	return timeline

def get_duration(input):
	metadata = ffmpeg.probe(input)
	return "{:0>8}".format(str(timedelta(seconds=float(metadata['format']['duration'].split('.')[0]))))

parser = argparse.ArgumentParser("Split media file by timeline with ffmpeg")
parser.add_argument("-i", dest='input', help="Source file path", type=str, required=True)
parser.add_argument("-d", dest='destination', help="Output destination", type=str, required=True)
parser.add_argument("-t", dest='timeline', help="Timeline file path", type=str, default='./timeline.csv')
parser.add_argument("-s", dest='pos_from', help="Timeline file path", type=str, default='00:00:00')
args = parser.parse_args()

os.makedirs(args.destination, exist_ok=True)

album = os.path.basename(args.destination)
pos_from = args.pos_from
input_file = args.input

timeline = parse_timeline(args.timeline)
timeline.append({'timeline': get_duration(input_file), 'title': 'eof'})

def convert(pos_from, pos_to, item, i):
	metadata_list = []
	metadata_list.append(f"title={item['title']}")
	title = item['title']

	if 'artist' in item:
		metadata_list.append(f"artist={item['artist']}")
		title = f"{item['artist']} - {title}"
	if 'album' in item:
		metadata_list.append(f"album={item['album']}")
	else:
		metadata_list.append(f"album={album}")

	metadata_dict = {f"metadata:g:{i}": e for i, e in enumerate(metadata_list)}

	ffmpeg.input(
		input_file,
		ss=(pos_from),
		to=(pos_to),
	).output(f"./{album}/{i} {title}.mp3", **metadata_dict).run(overwrite_output=True)

for i in range(len(timeline) - 1):
	pos_to = timeline[i+1]['timeline']
	item = timeline[i]

	convert(pos_from, pos_to, item, i+1)

	pos_from = pos_to

timeline.example.csv