def _parse_smil(self, video_id, smil_url):
        formats = []
        _SWITCH_XPATH = (
            './/{http://www.w3.org/2001/SMIL20/Language}body/'
            '{http://www.w3.org/2001/SMIL20/Language}switch')
        smil_doc = self._download_xml(
            smil_url, video_id,
            note='Downloading SMIL information',
            errnote='Unable to download SMIL information',
            fatal=False)
        if smil_doc is False:  # Download failed
            return formats
        title_node = find_xpath_attr(
            smil_doc, './/{http://www.w3.org/2001/SMIL20/Language}meta',
            'name', 'title')
        if title_node is None:
            self.report_warning('Cannot find SMIL id')
            switch_node = smil_doc.find(_SWITCH_XPATH)
        else:
            title_id = title_node.attrib['content']
            switch_node = find_xpath_attr(
                smil_doc, _SWITCH_XPATH, 'id', title_id)
        if switch_node is None:
            raise ExtractorError('Cannot find switch node')
        video_nodes = switch_node.findall(
            '{http://www.w3.org/2001/SMIL20/Language}video')

        for vn in video_nodes:
            tbr = int_or_none(vn.attrib.get('system-bitrate'))
            furl = (
                'http://livestream-f.akamaihd.net/%s?v=3.0.3&fp=WIN%%2014,0,0,145' %
                (vn.attrib['src']))
            if 'clipBegin' in vn.attrib:
                furl += '&ssek=' + vn.attrib['clipBegin']
            formats.append({
                'url': furl,
                'format_id': 'smil_%d' % tbr,
                'ext': 'flv',
                'tbr': tbr,
                'preference': -1000,
            })
        return formats
dataset/ETHPy150Open yasoob/youtube-dl-GUI/youtube_dl/extractor/livestream.py/LivestreamIE._parse_smil/original