[youtube] Signature extraction failed

[RfzVd]

Output from youtube-dl --verbose vuQ9_jZ0Kf0 with version 2015.12.13

[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'--verbose', u'vuQ9_jZ0Kf0']
[debug] Encodings: locale UTF-8, fs UTF-8, out None, pref UTF-8
[debug] youtube-dl version 2015.12.13
[debug] Python version 2.7.3 - Linux-3.2.0-4-686-pae-i686-with-debian-7.9
[debug] exe versions: avconv 0.8.17-6, avprobe 0.8.17-6, ffmpeg 0.8.17-6, ffprobe 0.8.17-6
[debug] Proxy map: {}
[youtube] vuQ9_jZ0Kf0: Downloading webpage
[youtube] vuQ9_jZ0Kf0: Downloading video info webpage
[youtube] vuQ9_jZ0Kf0: Extracting video information
[youtube] {22} signature length 43.43, html5 player en_US-vflXJM_5_
[youtube] vuQ9_jZ0Kf0: Downloading player https://s.ytimg.com/yts/jsbin/player-en_US-vflXJM_5_/base.js
ERROR: Signature extraction failed: Traceback (most recent call last):
File "/home/user/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 877, in _decrypt_signature
video_id, player_url, s
File "/home/user/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 792, in _extract_signature_function
res = self._parse_sig_js(code)
File "/home/user/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 855, in _parse_sig_js
initial_function = jsi.extract_function(funcname)
File "/home/user/bin/youtube-dl/youtube_dl/jsinterp.py", line 241, in extract_function
raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'gr'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type youtube-dl -U to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
(caused by ExtractorError(u"Could not find JS function u'gr'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type youtube-dl -U to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.",)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type youtube-dl -U to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
File "/home/user/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 877, in _decrypt_signature
video_id, player_url, s
File "/home/user/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 792, in _extract_signature_function
res = self._parse_sig_js(code)
File "/home/user/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 855, in _parse_sig_js
initial_function = jsi.extract_function(funcname)
File "/home/user/bin/youtube-dl/youtube_dl/jsinterp.py", line 241, in extract_function
raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'gr'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type youtube-dl -U to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
File "/home/user/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 663, in extract_info
ie_result = ie.extract(url)
File "/home/user/bin/youtube-dl/youtube_dl/extractor/common.py", line 290, in extract
return self._real_extract(url)
File "/home/user/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 1431, in _real_extract
encrypted_sig, video_id, player_url, age_gate)
File "/home/user/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 887, in _decrypt_signature
'Signature extraction failed: ' + tb, cause=e)
ExtractorError: Signature extraction failed: Traceback (most recent call last):
File "/home/user/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 877, in _decrypt_signature
video_id, player_url, s
File "/home/user/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 792, in _extract_signature_function
res = self._parse_sig_js(code)
File "/home/user/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 855, in _parse_sig_js
initial_function = jsi.extract_function(funcname)
File "/home/user/bin/youtube-dl/youtube_dl/jsinterp.py", line 241, in extract_function
raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'gr'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type youtube-dl -U to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
(caused by ExtractorError(u"Could not find JS function u'gr'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type youtube-dl -U to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.",)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type youtube-dl -U to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

[phihag]

Thank you for the report. I believe this issue to be fixed in the current version of youtube-dl, 2015.12.18. See our FAQ if you need help updating.