Download video and extract audio using Youtube-DL

ydl-download-video-extract-audio

class MyLogger(object):
    def debug(self, msg):
        pass

    def warning(self, msg):
        pass

    def error(self, msg):
        #job = get_current_job()
        #job.meta['progress'] = msg
        #job.save()
        print(msg)

class DownloadConvert(object):
    """
    Uses Youtube.dl to download video file and convert and extract audio file.
    """

    def __init__(self, file_input, file_output, audio_codec, logger=MyLogger()):
        self.file_input = file_input
        self.file_output = file_output
        self.audio_codec = audio_codec
        self.ydl_opts = {
            'format': 'bestaudio/best',
            'outtmpl': self.file_output,
            'postprocessors': [{
                'key': 'FFmpegExtractAudio',
                'preferredcodec': self.audio_codec,
                'preferredquality': '5',
            }],
            'logger': logger,
            'progress_hooks': [self.done_hook],
        }

    #for debugging
    def progress_hook(self, download):
        if download['status'] == 'downloading':
            sys.stdout.write(str(download['eta']))
            sys.stdout.flush()

    def done_hook(self, download):
        if download['status'] == 'finished':
            print('Done downloading, now converting ...')

    def download_convert_file(self):
        with youtube_dl.YoutubeDL(self.ydl_opts) as ydl:
            ydl.download([self.file_input])
            print('File conversion done.')