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ERROR: Signature extraction failed: Traceback (most recent call last): #3468

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opened 2026-02-20 23:23:58 -05:00 by deekerman · 3 comments

deekerman commented

2026-02-20 23:23:58 -05:00

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Originally created by @colapsnux on GitHub (Nov 18, 2014).

Hello!
Yesterday everything worked for me.
Now I get this error :

youtube-dl --verbose -x --audio-format mp3 http://www.youtube.com/watch?v=QVQ5hWEtjrc

[youtube] Confirming age
[youtube] QVQ5hWEtjrc: Downloading webpage
[youtube] QVQ5hWEtjrc: Downloading video info webpage
[youtube] QVQ5hWEtjrc: Extracting video information
[youtube] QVQ5hWEtjrc: Encrypted signatures detected.
[youtube] {43} signature length 40.42, html5 player en_US-vflM7pYrM
[youtube] QVQ5hWEtjrc: Downloading js player vflM7pYrM
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--verbose', '-x', '--audio-format', 'mp3', 'http://www.youtube.com/watch?v=QVQ5hWEtjrc']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2014.10.30
[debug] Python version 2.7.8 - Linux-3.16.0-4-amd64-x86_64-with-debian-jessie-sid
[debug] exe versions: avconv 11-6, avprobe 11-6
[debug] Proxy map: {}
ERROR: Signature extraction failed: Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 541, in _decrypt_signature
video_id, player_url, s
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 455, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 516, in _parse_sig_js
'Initial JS player signature function name')
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 432, in _search_regex
raise RegexNotFoundError('Unable to extract %s' % _name)
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.
(caused by RegexNotFoundError(u'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 "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 541, in _decrypt_signature
video_id, player_url, s
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 455, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 516, in _parse_sig_js
'Initial JS player signature function name')
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 432, in _search_regex
raise RegexNotFoundError('Unable to extract %s' % _name)
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 "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 533, in extract_info
ie_result = ie.extract(url)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 198, in extract
return self._real_extract(url)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 936, in _real_extract
encrypted_sig, video_id, player_url, age_gate)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 551, in _decrypt_signature
'Signature extraction failed: ' + tb, cause=e)
ExtractorError: Signature extraction failed: Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 541, in _decrypt_signature
video_id, player_url, s
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 455, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 516, in _parse_sig_js
'Initial JS player signature function name')
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 432, in _search_regex
raise RegexNotFoundError('Unable to extract %s' % _name)
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.
(caused by RegexNotFoundError(u'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.

Kernel 3.16.0-4-amd64 #1 SMP Debian 3.16.7-2 (2014-11-06) x86_64 GNU/Linux

Originally created by @colapsnux on GitHub (Nov 18, 2014). Hello! Yesterday everything worked for me. Now I get this error : youtube-dl --verbose -x --audio-format mp3 http://www.youtube.com/watch?v=QVQ5hWEtjrc [youtube] Confirming age [youtube] QVQ5hWEtjrc: Downloading webpage [youtube] QVQ5hWEtjrc: Downloading video info webpage [youtube] QVQ5hWEtjrc: Extracting video information [youtube] QVQ5hWEtjrc: Encrypted signatures detected. [youtube] {43} signature length 40.42, html5 player en_US-vflM7pYrM [youtube] QVQ5hWEtjrc: Downloading js player vflM7pYrM [debug] System config: [] [debug] User config: [] [debug] Command-line args: ['--verbose', '-x', '--audio-format', 'mp3', 'http://www.youtube.com/watch?v=QVQ5hWEtjrc'] [debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8 [debug] youtube-dl version 2014.10.30 [debug] Python version 2.7.8 - Linux-3.16.0-4-amd64-x86_64-with-debian-jessie-sid [debug] exe versions: avconv 11-6, avprobe 11-6 [debug] Proxy map: {} ERROR: Signature extraction failed: Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 541, in _decrypt_signature video_id, player_url, s File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 455, in _extract_signature_function res = self._parse_sig_js(code) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 516, in _parse_sig_js 'Initial JS player signature function name') File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 432, in _search_regex raise RegexNotFoundError('Unable to extract %s' % _name) 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. (caused by RegexNotFoundError(u'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 "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 541, in _decrypt_signature video_id, player_url, s File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 455, in _extract_signature_function res = self._parse_sig_js(code) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 516, in _parse_sig_js 'Initial JS player signature function name') File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 432, in _search_regex raise RegexNotFoundError('Unable to extract %s' % _name) 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 "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 533, in extract_info ie_result = ie.extract(url) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 198, in extract return self._real_extract(url) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 936, in _real_extract encrypted_sig, video_id, player_url, age_gate) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 551, in _decrypt_signature 'Signature extraction failed: ' + tb, cause=e) ExtractorError: Signature extraction failed: Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 541, in _decrypt_signature video_id, player_url, s File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 455, in _extract_signature_function res = self._parse_sig_js(code) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 516, in _parse_sig_js 'Initial JS player signature function name') File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 432, in _search_regex raise RegexNotFoundError('Unable to extract %s' % _name) 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. (caused by RegexNotFoundError(u'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. Kernel 3.16.0-4-amd64 #1 SMP Debian 3.16.7-2 (2014-11-06) x86_64 GNU/Linux

deekerman closed this issue

2026-02-20 23:24:00 -05:00

deekerman commented

2026-02-20 23:24:02 -05:00

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Owner

@jaimeMF commented on GitHub (Nov 18, 2014):

You're using an outdated version, read the FAQ for updating.

@jaimeMF commented on GitHub (Nov 18, 2014): You're using an outdated version, read [the FAQ](https://github.com/rg3/youtube-dl/blob/master/README.md#how-do-i-update-youtube-dl) for updating.

deekerman commented

2026-02-20 23:24:02 -05:00

Author

Owner

@colapsnux commented on GitHub (Nov 18, 2014):

Great. Thanks you all work :)
And thanks again for fast reply

@colapsnux commented on GitHub (Nov 18, 2014): Great. Thanks you all work :) And thanks again for fast reply

deekerman commented

2026-02-20 23:24:02 -05:00

Author

Owner

@tusharniras commented on GitHub (Nov 18, 2015):

Just Reinstall it.. It resolved my issue.

@tusharniras commented on GitHub (Nov 18, 2015): Just Reinstall it.. It resolved my issue.

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