+ def decode_url(encoded_url):
+ return compat_b64decode(encoded_url).decode('utf-8')
+
+ stream_url = url_or_none(decode_url(self._search_regex(
+ r'data-stream\s*=\s*(["\'])(?P<url>(?:(?!\1).)+)\1', webpage,
+ 'stream url', default=None, group='url')))
+ if stream_url:
+ return stream_url