#!/usr/bin/env python
# -*- coding:utf-8 -*-

import commands

files = commands.getoutput('ls -1 *.mp4').splitlines()
for afile in files:
    print afile
    chapter = afile.replace('.mp4','') + '_chapters.xml'
    print chapter
    commands.getoutput('MP4Box afile %s -chap %s' % (afile, chapter))