+ final_song_url = self._get_url(template_url)
+ if final_song_url is None:
+ self.to_screen('Trying with m4a extension')
+ template_url = template_url.replace('.mp3', '.m4a').replace('originals/', 'm4a/64/')
+ final_song_url = self._get_url(template_url)
+ if final_song_url is None:
+ raise ExtractorError(u'Unable to extract track url')