ERROR: Automatic signature extraction failed

[aliensunmin]

Hi all,

When I issued the following command

youtube-dl http://www.youtube.com/watch?v=EqHxnJholtI

I get the following error message

[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['http://www.youtube.com/watch?v=EqHxnJholtI', '--verbose']
[debug] Encodings: locale UTF-8, fs UTF-8, out None, pref UTF-8
[debug] youtube-dl version 2014.07.11.3
[debug] Python version 2.7.4 - Linux-3.8.0-35-generic-x86_64-with-Ubuntu-13.04-raring
[debug] Proxy map: {}
[youtube] Setting language
[youtube] EqHxnJholtI: Downloading webpage
[youtube] EqHxnJholtI: Downloading video info webpage
[youtube] EqHxnJholtI: Extracting video information
[youtube] EqHxnJholtI: Encrypted signatures detected.
[youtube] encrypted signature length 84 (40.43), itag 22, html5 player en_US-vfl0Cbn9e
[youtube] EqHxnJholtI: Downloading js player vfl0Cbn9e
WARNING: Writing cache to u'/home/sunmin/.cache/youtube-dl/youtube-sigfuncs/js_vfl0Cbn9e_84.json' failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 391, in _extract_signature_function
cache_res = res(test_string)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 449, in
return lambda s: initial_function([s])
File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 113, in resf
res = self.interpret_statement(stmt, local_vars)
File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 45, in interpret_statement
v = self.interpret_expression(expr, local_vars, allow_recursion)
File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 58, in interpret_expression
val = local_vars[m.group('in')]
KeyError: u'fo'

ERROR: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 883, in _decrypt_signature
return func(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 449, in
return lambda s: initial_function([s])
File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 113, in resf
res = self.interpret_statement(stmt, local_vars)
File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 45, in interpret_statement
v = self.interpret_expression(expr, local_vars, allow_recursion)
File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 58, in interpret_expression
val = local_vars[m.group('in')]
KeyError: u'fo'
; 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/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 883, in _decrypt_signature
return func(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 449, in
return lambda s: initial_function([s])
File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 113, in resf
res = self.interpret_statement(stmt, local_vars)
File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 45, in interpret_statement
v = self.interpret_expression(expr, local_vars, allow_recursion)
File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 58, in interpret_expression
val = local_vars[m.group('in')]
KeyError: u'fo'
Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 516, in extract_info
ie_result = ie.extract(url)
File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 168, in extract
return self._real_extract(url)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 1249, in _real_extract
encrypted_sig, video_id, player_url, age_gate)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 887, in _decrypt_signature
u'Automatic signature extraction failed: ' + tb, cause=e)
ExtractorError: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 883, in _decrypt_signature
return func(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 449, in
return lambda s: initial_function([s])
File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 113, in resf
res = self.interpret_statement(stmt, local_vars)
File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 45, in interpret_statement
v = self.interpret_expression(expr, local_vars, allow_recursion)
File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 58, in interpret_expression
val = local_vars[m.group('in')]
KeyError: u'fo'

; 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.

I just updated by youtube-dl version.

youtube-dl --version

2014.07.11.3

This error only happens for some videos.
Please help or let me know if you have seen similar issues.

Thanks,

[ixchelinme]

Happens to me exactly the same, update a few minutes ago and almost all the videos I've seen the same thing happens

If not understood what I wrote, it's because I did not speak English and use Google Translate

 youtube-dl --verbose
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--verbose']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2014.07.11.3
[debug] Python version 3.4.1 - Linux-3.15.2-1-ARCH-i686-with-arch
[debug] Proxy map: {}
Usage: youtube-dl [options] url [url...]

youtube-dl: error: you must provide at least one URL

 WARNING: Writing cache to '/home/house/.cache/youtube-dl/youtube-sigfuncs/js_vfl0Cbn9e_84.json' failed: Traceback (most recent call last):
  File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 391, in _extract_signature_function
    cache_res = res(test_string)
  File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 449, in <lambda>
    return lambda s: initial_function([s])
  File "/usr/lib/python3.4/site-packages/youtube_dl/jsinterp.py", line 113, in resf
    res = self.interpret_statement(stmt, local_vars)
  File "/usr/lib/python3.4/site-packages/youtube_dl/jsinterp.py", line 45, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/usr/lib/python3.4/site-packages/youtube_dl/jsinterp.py", line 58, in interpret_expression
    val = local_vars[m.group('in')]
KeyError: 'fo'

ERROR: Automatic signature extraction failed: Traceback (most recent call last):
  File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 883, in _decrypt_signature
    return func(s)
  File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 449, in <lambda>
    return lambda s: initial_function([s])
  File "/usr/lib/python3.4/site-packages/youtube_dl/jsinterp.py", line 113, in resf
    res = self.interpret_statement(stmt, local_vars)
  File "/usr/lib/python3.4/site-packages/youtube_dl/jsinterp.py", line 45, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "/usr/lib/python3.4/site-packages/youtube_dl/jsinterp.py", line 58, in interpret_expression
    val = local_vars[m.group('in')]
KeyError: 'fo'
; 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.

Thanks for your attention, have a nice day

[phihag]

Fixed in youtube-dl 2014.07.15. Type sudo youtube-dl -U to update.

[ixchelinme]

Thank you By his prompt answer, that have a good day

[sudarsun]

Upgrading to 2016.05.01 solved the problem for me today.