Signature extraction failed: Traceback

[PedroLopes]

Full log:

pedro:~ pedro$ youtube-dl --verbose -x -t --audio-format mp3
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--verbose', '-x', '-t', '--audio-format', 'mp3', ']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2014.08.10
[debug] Python version 3.4.0 - Darwin-12.2.0-x86_64-i386-64bit
[debug] Proxy map: {}
[youtube] Setting language
[youtube] : Downloading webpage
[youtube] : Downloading video info webpage
[youtube] : Extracting video information
[youtube] : Encrypted signatures detected.
[youtube] {22} signature length 43.40, html5 player en_US-vfliCyt2w
[youtube] : Downloading js player vfliCyt2w
ERROR: Signature extraction failed: Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 479, in _decrypt_signature
video_id, player_url, s
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 383, in _extract_signature_function
res = self._parse_sig_js(code)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 454, in _parse_sig_js
u'Initial JS player signature function name')
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/common.py", line 391, in _search_regex
raise RegexNotFoundError(u'Unable to extract %s' % _name)
youtube_dl.utils.RegexNotFoundError: Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 479, in _decrypt_signature
video_id, player_url, s
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 383, in _extract_signature_function
res = self._parse_sig_js(code)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 454, in _parse_sig_js
u'Initial JS player signature function name')
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/common.py", line 391, in _search_regex
raise RegexNotFoundError(u'Unable to extract %s' % _name)
youtube_dl.utils.RegexNotFoundError: Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 479, in _decrypt_signature
video_id, player_url, s
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 383, in _extract_signature_function
res = self._parse_sig_js(code)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 454, in _parse_sig_js
u'Initial JS player signature function name')
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/common.py", line 391, in _search_regex
raise RegexNotFoundError(u'Unable to extract %s' % _name)
youtube_dl.utils.RegexNotFoundError: Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/YoutubeDL.py", line 516, in extract_info
ie_result = ie.extract(url)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/common.py", line 170, in extract
return self._real_extract(url)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 860, in _real_extract
encrypted_sig, video_id, player_url, age_gate)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 489, in _decrypt_signature
u'Signature extraction failed: ' + tb, cause=e)
youtube_dl.utils.ExtractorError: Signature extraction failed: Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 479, in _decrypt_signature
video_id, player_url, s
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 383, in _extract_signature_function
res = self._parse_sig_js(code)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 454, in _parse_sig_js
u'Initial JS player signature function name')
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/youtube_dl/extractor/common.py", line 391, in _search_regex
raise RegexNotFoundError(u'Unable to extract %s' % _name)
youtube_dl.utils.RegexNotFoundError: Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.

[jaimeMF]

YouTube changed their player on November 13th, so you'll need at least youtube-dl 2014.11.13 to play all YouTube videos. See our FAQ if you have trouble updating.

Since it doesn't appear any youtube url/id in the output, I can't test it. For future reports please don't remove the url, since sometimes a bug is specific to an url.