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Signature extraction failed #8302

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opened 2026-02-21 04:19:26 -05:00 by deekerman · 3 comments

deekerman commented

2026-02-21 04:19:26 -05:00

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Originally created by @ma7amd on GitHub (Jul 26, 2016).

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

Make sure you are using the latest version: run `youtube-dl --version` and ensure your version is 2016.07.26.2. 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 Issues with outdated version will be rejected.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 2016.07.26.2

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

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

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 ```):

pugo@PC:/media/pugo/Entertainment/YoutubeDownloads/Django Special Course/install Django On Linux$ youtube-dl -c -i -v -o '%(autonumber)s.%(title)s.%(ext)s' https://www.youtube.com/playlist?list=PLEsfXFp6DpzTh0XQn528bI3XiLpz0pzL2
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'-c', u'-i', u'-v', u'-o', u'%(autonumber)s.%(title)s.%(ext)s', u'https://www.youtube.com/playlist?list=PLEsfXFp6DpzTh0XQn528bI3XiLpz0pzL2']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2016.02.22
[debug] Python version 2.7.12 - Linux-4.4.0-31-generic-x86_64-with-Ubuntu-16.04-xenial
[debug] exe versions: ffmpeg 2.8.6-1ubuntu2, ffprobe 2.8.6-1ubuntu2, rtmpdump 2.4
[debug] Proxy map: {}
[youtube:playlist] PLEsfXFp6DpzTh0XQn528bI3XiLpz0pzL2: Downloading webpage
[download] Downloading playlist: Install Django on Linux Ubuntu
[youtube:playlist] playlist Install Django on Linux Ubuntu: Downloading 3 videos
[download] Downloading video 1 of 3
[youtube] Et6zjEfv_-c: Downloading webpage
[youtube] Et6zjEfv_-c: Downloading video info webpage
[youtube] Et6zjEfv_-c: Extracting video information
[youtube] {22} signature length 43.40, html5 player en_US-vflIB5TLK
[youtube] Et6zjEfv_-c: Downloading player https://s.ytimg.com/yts/jsbin/player-en_US-vflIB5TLK/base.js
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 905, in _decrypt_signature
    video_id, player_url, s
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 820, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 883, in _parse_sig_js
    initial_function = jsi.extract_function(funcname)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 241, in extract_function
    raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'Yy'; 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(u"Could not find JS function u'Yy'; 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/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 905, in _decrypt_signature
    video_id, player_url, s
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 820, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 883, in _parse_sig_js
    initial_function = jsi.extract_function(funcname)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 241, in extract_function
    raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'Yy'; 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/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 666, in extract_info
    ie_result = ie.extract(url)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 316, in extract
    return self._real_extract(url)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1407, in _real_extract
    encrypted_sig, video_id, player_url, age_gate)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 915, 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 905, in _decrypt_signature
    video_id, player_url, s
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 820, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 883, in _parse_sig_js
    initial_function = jsi.extract_function(funcname)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 241, in extract_function
    raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'Yy'; 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(u"Could not find JS function u'Yy'; 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.

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):

Description of your issue, suggested solution and other information

I don't know exactly where is the bug or the main issue that makes youtube-dl suddenly not downloading videos as usual.

Originally created by @ma7amd on GitHub (Jul 26, 2016). ## 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 --- ### Make sure you are using the _latest_ version: run `youtube-dl --version` and ensure your version is _2016.07.26.2_. If it's not read [this FAQ entry](https://github.com/rg3/youtube-dl/blob/master/README.md#how-do-i-update-youtube-dl) and update. Issues with outdated version will be rejected. - [x ] I've **verified** and **I assure** that I'm running youtube-dl **2016.07.26.2** ### Before submitting an _issue_ make sure you have: - [ x] At least skimmed through [README](https://github.com/rg3/youtube-dl/blob/master/README.md) and **most notably** [FAQ](https://github.com/rg3/youtube-dl#faq) and [BUGS](https://github.com/rg3/youtube-dl#bugs) sections - [ x] [Searched](https://github.com/rg3/youtube-dl/search?type=Issues) 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 --- ### The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your _issue_ --- ### 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 ```): ``` pugo@PC:/media/pugo/Entertainment/YoutubeDownloads/Django Special Course/install Django On Linux$ youtube-dl -c -i -v -o '%(autonumber)s.%(title)s.%(ext)s' https://www.youtube.com/playlist?list=PLEsfXFp6DpzTh0XQn528bI3XiLpz0pzL2 [debug] System config: [] [debug] User config: [] [debug] Command-line args: [u'-c', u'-i', u'-v', u'-o', u'%(autonumber)s.%(title)s.%(ext)s', u'https://www.youtube.com/playlist?list=PLEsfXFp6DpzTh0XQn528bI3XiLpz0pzL2'] [debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8 [debug] youtube-dl version 2016.02.22 [debug] Python version 2.7.12 - Linux-4.4.0-31-generic-x86_64-with-Ubuntu-16.04-xenial [debug] exe versions: ffmpeg 2.8.6-1ubuntu2, ffprobe 2.8.6-1ubuntu2, rtmpdump 2.4 [debug] Proxy map: {} [youtube:playlist] PLEsfXFp6DpzTh0XQn528bI3XiLpz0pzL2: Downloading webpage [download] Downloading playlist: Install Django on Linux Ubuntu [youtube:playlist] playlist Install Django on Linux Ubuntu: Downloading 3 videos [download] Downloading video 1 of 3 [youtube] Et6zjEfv_-c: Downloading webpage [youtube] Et6zjEfv_-c: Downloading video info webpage [youtube] Et6zjEfv_-c: Extracting video information [youtube] {22} signature length 43.40, html5 player en_US-vflIB5TLK [youtube] Et6zjEfv_-c: Downloading player https://s.ytimg.com/yts/jsbin/player-en_US-vflIB5TLK/base.js ERROR: Signature extraction failed: Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 905, in _decrypt_signature video_id, player_url, s File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 820, in _extract_signature_function res = self._parse_sig_js(code) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 883, in _parse_sig_js initial_function = jsi.extract_function(funcname) File "/usr/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 241, in extract_function raise ExtractorError('Could not find JS function %r' % funcname) ExtractorError: Could not find JS function u'Yy'; 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(u"Could not find JS function u'Yy'; 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/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 905, in _decrypt_signature video_id, player_url, s File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 820, in _extract_signature_function res = self._parse_sig_js(code) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 883, in _parse_sig_js initial_function = jsi.extract_function(funcname) File "/usr/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 241, in extract_function raise ExtractorError('Could not find JS function %r' % funcname) ExtractorError: Could not find JS function u'Yy'; 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/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 666, in extract_info ie_result = ie.extract(url) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 316, in extract return self._real_extract(url) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1407, in _real_extract encrypted_sig, video_id, player_url, age_gate) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 915, 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 905, in _decrypt_signature video_id, player_url, s File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 820, in _extract_signature_function res = self._parse_sig_js(code) File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 883, in _parse_sig_js initial_function = jsi.extract_function(funcname) File "/usr/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 241, in extract_function raise ExtractorError('Could not find JS function %r' % funcname) ExtractorError: Could not find JS function u'Yy'; 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(u"Could not find JS function u'Yy'; 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. ``` --- ### 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=Et6zjEfv_-c&list=PLEsfXFp6DpzTh0XQn528bI3XiLpz0pzL2&index=1 - Playlist: https://www.youtube.com/playlist?list=PLEsfXFp6DpzTJ9L8KrHfF_vt9mSV5foAO - Playlist: https://www.youtube.com/playlist?list=PLEsfXFp6DpzTh0XQn528bI3XiLpz0pzL2 --- ### Description of your _issue_, suggested solution and other information I don't know exactly where is the bug or the main issue that makes youtube-dl suddenly not downloading videos as usual.

deekerman closed this issue

2026-02-21 04:19:28 -05:00

deekerman commented

2026-02-21 04:19:29 -05:00

Author

Owner

@dstftw commented on GitHub (Jul 26, 2016):

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

@dstftw commented on GitHub (Jul 26, 2016): You are using an outdated version of youtube-dl. Read [our FAQ](https://yt-dl.org/update) if you have troubles updating.

deekerman commented

2026-02-21 04:19:30 -05:00

Author

Owner

@ma7amd commented on GitHub (Jul 27, 2016):

No sir iam using the version below :
pugo@PC:/$ youtube-dl --version
2016.07.26.2

@ma7amd commented on GitHub (Jul 27, 2016): No sir iam using the version below : pugo@PC:/$ youtube-dl --version 2016.07.26.2

deekerman commented

2026-02-21 04:19:30 -05:00

Author

Owner

@dstftw commented on GitHub (Jul 27, 2016):

No, you don't:

[debug] youtube-dl version 2016.02.22

@dstftw commented on GitHub (Jul 27, 2016): No, you don't: ``` [debug] youtube-dl version 2016.02.22 ```

deekerman referenced this issue

2026-02-21 04:23:01 -05:00

youtube-dl doesn't use locking to prevent concurrent writing to output files #8454

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starred/youtube-dl-ytdl-org#8302

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Signature extraction failed #8302

Please follow the guide below

Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2016.07.26.2. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.

Before submitting an issue make sure you have:

What is the purpose of your issue?

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

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:

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):

Description of your issue, suggested solution and other information

Make sure you are using the latest version: run `youtube-dl --version` and ensure your version is 2016.07.26.2. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.