Signature extraction failed: Traceback #5581

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opened 2026-02-21 01:16:38 -05:00 by deekerman · 1 comment

deekerman commented

2026-02-21 01:16:38 -05:00

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Originally created by @kubanowSKY on GitHub (Sep 9, 2015).

kubanowsky@kubanowsky:~
$ youtube-dl --playlist-start 108 -x --audio-format mp3 --audio-quality 0 https://www.youtube.com/playlist?list=PLzcST9n6QAXVpLpHhm9G0cNDOMfGsy7RF --verbose
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--playlist-start', '108', '-x', '--audio-format', 'mp3', '--audio-quality', '0', 'https://www.youtube.com/playlist?list=PLzcST9n6QAXVpLpHhm9G0cNDOMfGsy7RF', '--verbose']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2014.08.05
[debug] Python version 2.7.9 - Linux-4.0.5-antix.1-486-smp-i686-with-antiX-15-jessie
[debug] Proxy map: {}
[youtube:playlist] PLzcST9n6QAXVpLpHhm9G0cNDOMfGsy7RF: Downloading webpage
[youtube:playlist] PLzcST9n6QAXVpLpHhm9G0cNDOMfGsy7RF: Downloading page #1
[download] Downloading playlist: Dobre nuty
[youtube:playlist] playlist Dobre nuty: Collected 112 video ids (downloading 5 of them)
[download] Downloading video #1 of 5
[youtube] Setting language
[youtube] oO10eNicsfQ: Downloading webpage
[youtube] oO10eNicsfQ: Downloading video info webpage
[youtube] oO10eNicsfQ: Extracting video information
[youtube] oO10eNicsfQ: Encrypted signatures detected.
[youtube] {22} signature length 46.43, html5 player new
[youtube] oO10eNicsfQ: Downloading js player new
ERROR: Signature extraction failed: Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 479, in _decrypt_signature
video_id, player_url, s
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 383, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 454, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 391, in _search_regex
raise RegexNotFoundError(u'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.
; 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 479, in _decrypt_signature
video_id, player_url, s
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 383, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 454, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 391, in _search_regex
raise RegexNotFoundError(u'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 516, in extract_info
ie_result = ie.extract(url)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 170, in extract
return self._real_extract(url)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 860, in _real_extract
encrypted_sig, video_id, player_url, age_gate)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 489, in _decrypt_signature
u'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 479, in _decrypt_signature
video_id, player_url, s
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 383, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 454, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 391, in _search_regex
raise RegexNotFoundError(u'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.
; 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.

Originally created by @kubanowSKY on GitHub (Sep 9, 2015). kubanowsky@kubanowsky:~ $ youtube-dl --playlist-start 108 -x --audio-format mp3 --audio-quality 0 https://www.youtube.com/playlist?list=PLzcST9n6QAXVpLpHhm9G0cNDOMfGsy7RF --verbose [debug] System config: [] [debug] User config: [] [debug] Command-line args: ['--playlist-start', '108', '-x', '--audio-format', 'mp3', '--audio-quality', '0', 'https://www.youtube.com/playlist?list=PLzcST9n6QAXVpLpHhm9G0cNDOMfGsy7RF', '--verbose'] [debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8 [debug] youtube-dl version 2014.08.05 [debug] Python version 2.7.9 - Linux-4.0.5-antix.1-486-smp-i686-with-antiX-15-jessie [debug] Proxy map: {} [youtube:playlist] PLzcST9n6QAXVpLpHhm9G0cNDOMfGsy7RF: Downloading webpage [youtube:playlist] PLzcST9n6QAXVpLpHhm9G0cNDOMfGsy7RF: Downloading page #1 [download] Downloading playlist: Dobre nuty [youtube:playlist] playlist Dobre nuty: Collected 112 video ids (downloading 5 of them) [download] Downloading video #1 of 5 [youtube] Setting language [youtube] oO10eNicsfQ: Downloading webpage [youtube] oO10eNicsfQ: Downloading video info webpage [youtube] oO10eNicsfQ: Extracting video information [youtube] oO10eNicsfQ: Encrypted signatures detected. [youtube] {22} signature length 46.43, html5 player new [youtube] oO10eNicsfQ: Downloading js player new ERROR: Signature extraction failed: Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 479, in _decrypt_signature video_id, player_url, s File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 383, in _extract_signature_function res = self._parse_sig_js(code) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 454, in _parse_sig_js u'Initial JS player signature function name') File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 391, in _search_regex raise RegexNotFoundError(u'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. ; 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 479, in _decrypt_signature video_id, player_url, s File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 383, in _extract_signature_function res = self._parse_sig_js(code) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 454, in _parse_sig_js u'Initial JS player signature function name') File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 391, in _search_regex raise RegexNotFoundError(u'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 516, in extract_info ie_result = ie.extract(url) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 170, in extract return self._real_extract(url) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 860, in _real_extract encrypted_sig, video_id, player_url, age_gate) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 489, in _decrypt_signature u'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 479, in _decrypt_signature video_id, player_url, s File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 383, in _extract_signature_function res = self._parse_sig_js(code) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 454, in _parse_sig_js u'Initial JS player signature function name') File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 391, in _search_regex raise RegexNotFoundError(u'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. ; 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.

deekerman closed this issue

2026-02-21 01:16:42 -05:00

deekerman commented

2026-02-21 01:16:44 -05:00

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@dstftw commented on GitHub (Sep 9, 2015):

You are using an outdated version of youtube-dl. Read our FAQ if you have troubles updating.

@dstftw commented on GitHub (Sep 9, 2015): You are using an outdated version of youtube-dl. Read [our FAQ](https://yt-dl.org/update) if you have troubles updating.

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starred/youtube-dl#5581

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