#!/usr/bin/python3
from glob import glob
import os
import shutil
import subprocess

for xml in glob('output/*.xml'):
    mp4 = xml.replace('.xml', '.mp4')
    pre = mp4 + '.pre.mp4'
    video = mp4 + '.v.mp4'
    audio = mp4 + '.wav'
    if not os.path.exists(mp4) or os.path.getmtime(xml) > os.path.getmtime(mp4):
        subprocess.call([
            'qmelt', xml, '-consumer', 'avformat:' + video, 'vcodec=libx264'
        ])
        subprocess.call([
            'qmelt', xml, '-consumer', 'avformat:' + audio,
        ])
        subprocess.call([
            'ffmpeg', '-y',
            '-i', video,
            '-i', audio,
            '-c:v', 'copy',
            '-map', '0:v',
            '-map', '1:a',
            '-strict', '-2',
            pre
        ])
        os.unlink(video)
        os.unlink(audio)
        shutil.move(pre, mp4)