clip vedio clip file in terms of time points

mclip.py

#!/usr/bin/env python
# -*- coding:utf8 -*-
import re

import click


@click.command()
@click.argument('movie')
@click.option('-S', '--split-file', 'split_file')
@click.option('-0', '--start-num', 'start_num', default=0, type=click.INT)
@click.option('-p', '--prefix', 'prefix', default='a')
def mclip(movie, split_file, prefix, start_num):
    u"""clicp vedio clip file in terms of time points in a file"""
    from moviepy.editor import VideoFileClip

    def verify_time_point(tp):
        ptn = re.compile(r'^\d{2}:\d{2}:\d{2}.\d{2}$')
        return isinstance(tp, basestring) and ptn.match(tp)

    with open(split_file, 'r') as split_file:
        time_points = map(lambda x: x[:-1], list(split_file))  # remove ending newline char
        assert all(map(verify_time_point, time_points)), 'invalid split file format'

    def do_clip(span, num=None):
        c = VideoFileClip(movie).subclip(span[0], span[1])
        c_name = prefix + str(num) + '.mp4'
        c.write_videofile(c_name)

    for i, sp in enumerate(zip(time_points[:-1], time_points[1:])):
        do_clip(sp, num=i + start_num)

    click.echo('clip done')


if __name__ == '__main__':
    mclip()