Signature extraction failed

[hersoncruz]

My script in python:

from __future__ import unicode_literals
import youtube_dl
import os
from sys import argv

# Download data and config

download_options = {
    'format': 'bestaudio/best',
    'outtmpl': '%(title)s.$(ext)s',
    'nocheckcertificate': True,
    'yesplaylist': True,
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        'preferredcodec': 'mp3',
        'preferredquality': '192',
    }],
}

# Songs folder
if not os.path.exists('Songs'):
    os.mkdir('Songs')
else:
    os.chdir('Songs')

# Download media
with youtube_dl.YoutubeDL(download_options) as dl:
    with open('../' + argv[1], 'r') as f:
        for song_url in f:
            dl.download([song_url])

The output:

[youtube:playlist] PLF-qa2XynaCU5lkOV4w7j6llxHvqQrW0n: Downloading webpage
[download] Downloading playlist: Music
[youtube:playlist] playlist Music: Downloading 12 videos
[download] Downloading video 1 of 12
[youtube] nzKOLBzdwM0: Downloading webpage
[youtube] nzKOLBzdwM0: Downloading video info webpage
[youtube] nzKOLBzdwM0: Downloading js player vflbDJ8ds
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1380, in _decrypt_signature
    video_id, player_url, s
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1293, in _extract_signature_function
    cache_res = res(test_string)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1356, in <lambda>
    return lambda s: initial_function([s])
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 258, in resf
    res, abort = self.interpret_statement(stmt, local_vars)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 92, in interpret_expression
    m.group('expr'), local_vars, allow_recursion - 1)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 189, in interpret_expression
    m.group('x'), local_vars, allow_recursion - 1)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 211, in interpret_expression
    raise ExtractorError('Unsupported JS expression %r' % expr)
youtube_dl.utils.ExtractorError: Unsupported JS expression '[1999057972,'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
 (caused by ExtractorError("Unsupported JS expression '[1999057972,'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how 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; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1380, in _decrypt_signature
    video_id, player_url, s
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1293, in _extract_signature_function
    cache_res = res(test_string)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1356, in <lambda>
    return lambda s: initial_function([s])
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 258, in resf
    res, abort = self.interpret_statement(stmt, local_vars)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 92, in interpret_expression
    m.group('expr'), local_vars, allow_recursion - 1)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 189, in interpret_expression
    m.group('x'), local_vars, allow_recursion - 1)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 211, in interpret_expression
    raise ExtractorError('Unsupported JS expression %r' % expr)
youtube_dl.utils.ExtractorError: Unsupported JS expression '[1999057972,'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 796, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/common.py", line 530, in extract
    ie_result = self._real_extract(url)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 2043, in _real_extract
    encrypted_sig, video_id, player_url, age_gate)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1390, in _decrypt_signature
    'Signature extraction failed: ' + tb, cause=e)
youtube_dl.utils.ExtractorError: Signature extraction failed: Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1380, in _decrypt_signature
    video_id, player_url, s
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1293, in _extract_signature_function
    cache_res = res(test_string)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1356, in <lambda>
    return lambda s: initial_function([s])
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 258, in resf
    res, abort = self.interpret_statement(stmt, local_vars)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 92, in interpret_expression
    m.group('expr'), local_vars, allow_recursion - 1)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 189, in interpret_expression
    m.group('x'), local_vars, allow_recursion - 1)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 211, in interpret_expression
    raise ExtractorError('Unsupported JS expression %r' % expr)
youtube_dl.utils.ExtractorError: Unsupported JS expression '[1999057972,'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
 (caused by ExtractorError("Unsupported JS expression '[1999057972,'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how 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; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "downloader.py", line 30, in <module>
    dl.download([song_url])
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 2018, in download
    url, force_generic_extractor=self.params.get('force_generic_extractor', False))
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 807, in extract_info
    return self.process_ie_result(ie_result, download, extra_info)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 1007, in process_ie_result
    extra_info=extra)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 869, in process_ie_result
    extra_info=extra_info)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 819, in extract_info
    self.report_error(compat_str(e), e.format_traceback())
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 624, in report_error
    self.trouble(error_message, tb)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 594, in trouble
    raise DownloadError(message, exc_info)
youtube_dl.utils.DownloadError: ERROR: Signature extraction failed: Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1380, in _decrypt_signature
    video_id, player_url, s
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1293, in _extract_signature_function
    cache_res = res(test_string)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1356, in <lambda>
    return lambda s: initial_function([s])
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 258, in resf
    res, abort = self.interpret_statement(stmt, local_vars)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 92, in interpret_expression
    m.group('expr'), local_vars, allow_recursion - 1)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 189, in interpret_expression
    m.group('x'), local_vars, allow_recursion - 1)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 56, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/usr/local/lib/python3.7/site-packages/youtube_dl/jsinterp.py", line 211, in interpret_expression
    raise ExtractorError('Unsupported JS expression %r' % expr)
youtube_dl.utils.ExtractorError: Unsupported JS expression '[1999057972,'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
 (caused by ExtractorError("Unsupported JS expression '[1999057972,'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how 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; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

[mineiroPT]

Probably related to this:
#23819

make sure you have the last version from 2020-01-24

[dmattera]

Probably related to this:
#23819

make sure you have the last version from 2020-01-24

I am not the original reporter of the issue but I too was receiving the same ExtractorError("Unsupported JS expression '[1999057972,'... error on some (not all) youtube links and can confirm that after updating from 2019.11.28 to 2020.1.24 the issue was resolved for all affected URLs

[hersoncruz]

Probably related to this:
#23819

make sure you have the last version from 2020-01-24

Already have latest version:

youtube-dl --version
2020.01.24

Issue persist.

[hersoncruz]

My bad, had to upgrade python package as well:

➜  pip3 uninstall youtube-dl
Uninstalling youtube-dl-2019.10.22:
  Would remove:
    /usr/local/bin/youtube-dl
    /usr/local/etc/bash_completion.d/youtube-dl.bash-completion
    /usr/local/etc/fish/completions/youtube-dl.fish
    /usr/local/lib/python3.7/site-packages/youtube_dl-2019.10.22.dist-info/*
    /usr/local/lib/python3.7/site-packages/youtube_dl/*
    /usr/local/share/doc/youtube_dl/README.txt
    /usr/local/share/man/man1/youtube-dl.1
Proceed (y/n)? y   
  Successfully uninstalled youtube-dl-2019.10.22

➜  pip3 install youtube-dl  
Collecting youtube-dl
  Downloading https://files.pythonhosted.org/packages/05/d4/64dfe51be0fae772e86be3c83d82ec22d59aa8521d8834e10355bf60f9f5/youtube_dl-2020.1.24-py2.py3-none-any.whl (1.8MB)
     |████████████████████████████████| 1.8MB 1.3MB/s 
Installing collected packages: youtube-dl
Successfully installed youtube-dl-2020.1.24

[neahahul]

I made a full system upgrade, error still persists

$ youtube-dl --verbose "https://youtu.be/sW8dvj-cn64"
[debug] System config: []
[debug] User config: ['-o', '~/Downloads/youtube-dl/%(title)s.%(ext)s']
[debug] Custom config: []
[debug] Command-line args: ['--add-metadata', '-i', '--verbose', 'https://youtu.be/sW8dvj-cn64']
[debug] Encodings: locale UTF-8, fs utf-8, out utf-8, pref UTF-8
[debug] youtube-dl version 2020.03.01
[debug] Python version 3.8.1 (CPython) - Linux-5.5.7-arch1-1-x86_64-with-glibc2.2.5
[debug] exe versions: ffmpeg 4.2.2, ffprobe 4.2.2
[debug] Proxy map: {}
[youtube] sW8dvj-cn64: Downloading webpage
[youtube] sW8dvj-cn64: Downloading video info webpage
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {18} signature length 108, html5 player None
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/youtube_dl/extractor/youtube.py", line 1384, in _decrypt_signature
    func = self._extract_signature_function(
  File "/usr/lib/python3.8/site-packages/youtube_dl/extractor/youtube.py", line 1262, in _extract_signature_function
    raise ExtractorError('Cannot identify player %r' % player_url)
youtube_dl.utils.ExtractorError: Cannot identify player 'https://www.youtube.com/s/player/4fbb4d5b/player_ias.vflset/en_US/base.js'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose
flag and include its complete output.
 (caused by ExtractorError("Cannot identify player 'https://www.youtube.com/s/player/4fbb4d5b/player_ias.vflset/en_US/base.js'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how 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; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/youtube_dl/extractor/youtube.py", line 1384, in _decrypt_signature
    func = self._extract_signature_function(
  File "/usr/lib/python3.8/site-packages/youtube_dl/extractor/youtube.py", line 1262, in _extract_signature_function
    raise ExtractorError('Cannot identify player %r' % player_url)
youtube_dl.utils.ExtractorError: Cannot identify player 'https://www.youtube.com/s/player/4fbb4d5b/player_ias.vflset/en_US/base.js'; please report this issue on  https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose
flag and include its complete output.
Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/youtube_dl/extractor/youtube.py", line 1384, in _decrypt_signature
    func = self._extract_signature_function(
  File "/usr/lib/python3.8/site-packages/youtube_dl/extractor/youtube.py", line 1262, in _extract_signature_function
    raise ExtractorError('Cannot identify player %r' % player_url)
youtube_dl.utils.ExtractorError: Cannot identify player 'https://www.youtube.com/s/player/4fbb4d5b/player_ias.vflset/en_US/base.js'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose
flag and include its complete output.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/youtube_dl/YoutubeDL.py", line 797, in extract_info
    ie_result = ie.extract(url)
  File "/usr/lib/python3.8/site-packages/youtube_dl/extractor/common.py", line 530, in extract
    ie_result = self._real_extract(url)
  File "/usr/lib/python3.8/site-packages/youtube_dl/extractor/youtube.py", line 2047, in _real_extract
    signature = self._decrypt_signature(
  File "/usr/lib/python3.8/site-packages/youtube_dl/extractor/youtube.py", line 1394, in _decrypt_signature
    raise ExtractorError(
youtube_dl.utils.ExtractorError: Signature extraction failed: Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/youtube_dl/extractor/youtube.py", line 1384, in _decrypt_signature
    func = self._extract_signature_function(
  File "/usr/lib/python3.8/site-packages/youtube_dl/extractor/youtube.py", line 1262, in _extract_signature_function
    raise ExtractorError('Cannot identify player %r' % player_url)
youtube_dl.utils.ExtractorError: Cannot identify player 'https://www.youtube.com/s/player/4fbb4d5b/player_ias.vflset/en_US/base.js'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose
flag and include its complete output.
 (caused by ExtractorError("Cannot identify player 'https://www.youtube.com/s/player/4fbb4d5b/player_ias.vflset/en_US/base.js'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how 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; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.