def _parse_f4m_formats(self, manifest, manifest_url, video_id, preference=None, f4m_id=None,
transform_source=lambda s: fix_xml_ampersands(s).strip(),
fatal=True):
+ # currently youtube-dl cannot decode the playerVerificationChallenge as Akamai uses Adobe Alchemy
+ akamai_pv = manifest.find('{http://ns.adobe.com/f4m/1.0}pv-2.0')
+ if akamai_pv is not None and ';' in akamai_pv.text:
+ playerVerificationChallenge = akamai_pv.text.split(';')[0]
+ if playerVerificationChallenge.strip() != '':
+ return []
+
formats = []
manifest_version = '1.0'
media_nodes = manifest.findall('{http://ns.adobe.com/f4m/1.0}media')