ERROR: Signature extraction failed: Traceback (most recent call last) version 2017.01.08

[trongnguyentcec]

Please follow the guide below

• You will be asked some questions and requested to provide some information, please read them carefully and answer honestly
• Put an x into all the boxes [ ] relevant to your issue (like that [x])
• Use Preview tab to see how your issue will actually look like

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2017.01.08. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.

• [X ] I've verified and I assure that I'm running youtube-dl 2017.01.08

Before submitting an issue make sure you have:

• [X ] At least skimmed through README and most notably FAQ and BUGS sections
• [ X] Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

• [X ] Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

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The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your issue

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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add -v flag to your command line you run youtube-dl with, copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

 
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'-F', u'hO6kISKcmvY']
[debug] Encodings: locale UTF-8, fs UTF-8, out None, pref UTF-8
[debug] youtube-dl version 2017.01.08
[debug] Python version 2.6.6 - Linux-2.6.32-504.8.1.el6.x86_64-x86_64-with-centos-6.7-Final
[debug] exe versions: none
[debug] Proxy map: {}
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "***/youtube_dl/extractor/youtube.py", line 1005, in _decrypt_signature
    video_id, player_url, s
  File "***/youtube-dl/youtube_dl/extractor/youtube.py", line 932, in _extract_signature_function
    cache_res = res(test_string)
  File "***/youtube-dl/youtube_dl/extractor/youtube.py", line 984, in <lambda>
    return lambda s: initial_function([s])
  File "***/youtube-dl/youtube_dl/jsinterp.py", line 254, in resf
    res, abort = self.interpret_statement(stmt, local_vars)
  File "***/youtube-dl/youtube_dl/jsinterp.py", line 55, in interpret_statement
    v = self.interpret_expression(expr, local_vars, allow_recursion)
  File "***/youtube-dl/youtube_dl/jsinterp.py", line 174, in interpret_expression
    return obj[member](argvals)
KeyError: u'qC'
 (caused by KeyError(u'qC',));
...
<end of log>

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If the purpose of this issue is a site support request please provide all kinds of example URLs support for which should be included (replace following example URLs by yours):

• Single video: https://www.youtube.com/watch?v=BaW_jenozKc
• Single video: https://youtu.be/BaW_jenozKc
• Playlist: https://www.youtube.com/playlist?list=PL4lCao7KL_QFVb7Iudeipvc2BCavECqzc

Note that youtube-dl does not support sites dedicated to copyright infringement. In order for site support request to be accepted all provided example URLs should not violate any copyrights.

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Description of your issue, suggested solution and other information

Explanation of your issue in arbitrary form goes here. Please make sure the description is worded well enough to be understood. Provide as much context and examples as possible.
If work on your issue requires account credentials please provide them or explain how one can obtain them.

[aster1sk]

Using the latest version I'm experiencing the same issue :

app_1      | [youtube] OEcBz6VtyDg: Downloading webpage
app_1      | [youtube] OEcBz6VtyDg: Downloading video info webpage
app_1      | [youtube] OEcBz6VtyDg: Extracting video information
app_1      | [youtube] OEcBz6VtyDg: Downloading js player en_US-vflsagga9
app_1      | ERROR: Signature extraction failed: Traceback (most recent call last):
app_1      |   File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1005, in _decrypt_signature
app_1      |     video_id, player_url, s
app_1      |   File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 932, in _extract_signature_function
app_1      |     cache_res = res(test_string)
app_1      |   File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 984, in <lambda>
app_1      |     return lambda s: initial_function([s])
app_1      |   File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 254, in resf
app_1      |     res, abort = self.interpret_statement(stmt, local_vars)
app_1      |   File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 55, in interpret_statement
app_1      |     v = self.interpret_expression(expr, local_vars, allow_recursion)
app_1      |   File "/usr/local/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 174, in interpret_expression
app_1      |     return obj[member](argvals)
app_1      | KeyError: u'qC'
app_1      |  (caused by KeyError(u'qC',)); 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.

Using arguments :

@gen.coroutine
def download(**kwargs):
    url = kwargs.get('url')
    logging.info("DOWNLOADING URL FROM : %s" % url)
    ydl_opts = {
        'format': 'bestaudio/best',
        'outtmpl': '/library/%(title)s.%(ext)s',
        'postprocessors': [{
            'key': 'FFmpegExtractAudio',
            'preferredcodec': 'mp3',
            'preferredquality': '128',
        }],
        'progress_hooks': [download_hook],
    }
    with YoutubeDL(ydl_opts) as ydl :
        ydl.download([url])

Happy to provide more information.

[yan12125]

See #11663