+ f4m_node = body.find(_x('smil:seq//smil:video'))
+ if f4m_node is not None:
+ f4m_url = f4m_node.attrib['src']
+ if 'manifest.f4m?' not in f4m_url:
+ f4m_url += '?'
+ # the parameters are from syfy.com, other sites may use others,
+ # they also work for nbc.com
+ f4m_url += '&g=UXWGVKRWHFSP&hdcore=3.0.3'
+ formats = [{
+ 'ext': 'flv',
+ 'url': f4m_url,
+ }]
+ else:
+ base_url = head.find(_x('smil:meta')).attrib['base']
+ switch = body.find(_x('smil:switch'))
+ formats = []
+ for f in switch.findall(_x('smil:video')):
+ attr = f.attrib
+ width = int(attr['width'])
+ height = int(attr['height'])
+ vbr = int(attr['system-bitrate']) // 1000
+ format_id = '%dx%d_%dk' % (width, height, vbr)
+ formats.append({
+ 'format_id': format_id,
+ 'url': base_url,
+ 'play_path': 'mp4:' + attr['src'],
+ 'ext': 'flv',
+ 'width': width,
+ 'height': height,
+ 'vbr': vbr,
+ })
+ self._sort_formats(formats)