ssl.SSLError: unknown error (_ssl.c:638)

[ghost]

Everything worked properly until I updated youtube-dl to 2015.04.03 with pip install --upgrade youtube-dl. This happens everytime I try to download something.

C:\Windows\system32>youtube-dl -v https://www.youtube.com/watch?v=9bZkp7q19f0
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-v', 'https://www.youtube.com/watch?v=9bZkp7q19f0']

Traceback (most recent call last):
  File "C:\Python34\lib\runpy.py", line 170, in _run_module_as_main
    "__main__", mod_spec)
  File "C:\Python34\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Python34\Scripts\youtube-dl.exe\__main__.py", line 9, in <module>
  File "C:\Python34\lib\site-packages\youtube_dl\__init__.py", line 408, in main

    _real_main(argv)
  File "C:\Python34\lib\site-packages\youtube_dl\__init__.py", line 375, in _rea
l_main
    with YoutubeDL(ydl_opts) as ydl:
  File "C:\Python34\lib\site-packages\youtube_dl\YoutubeDL.py", line 331, in __i
nit__
    self._setup_opener()
  File "C:\Python34\lib\site-packages\youtube_dl\YoutubeDL.py", line 1775, in _s
etup_opener
    if hasattr(ctx, 'get_ca_certs') and len(ctx.get_ca_certs()) == 0:
ssl.SSLError: unknown error (_ssl.c:638)

[jaimeMF]

I haven't tested it in windows yet. A similar issue has also been reported in the cpython bugtracker, could you try running the test script they posted?

[ghost]

Sure, here's the output:

Traceback (most recent call last):
  File "C:\Users\Admin\Desktop\win_ca_test.py", line 8, in <module>
    ca_certs = context.get_ca_certs()
ssl.SSLError: unknown error (_ssl.c:638)

[jaimeMF]

Thanks, could you try the following script?

import ssl

# Load default certificates
context = ssl.create_default_context(ssl.Purpose.SERVER_AUTH)
context.load_default_certs()
stats = context.cert_store_stats()
print('Stats:', stats)
ca_certs = context.get_ca_certs()
print('{} CA Certificates loaded:'.format(len(ca_certs)))
for cert_dict in ca_certs:
    print(cert_dict['subject'])
print()

With the previous version, could YouTube videos be downloaded?

[ghost]

Stats: {'x509_ca': 296, 'x509': 298, 'crl': 0}
Traceback (most recent call last):
  File "C:\Users\Admin\Desktop\script.py", line 8, in <module>
    ca_certs = context.get_ca_certs()
ssl.SSLError: unknown error (_ssl.c:638)

I'm not sure which version I was using previously. It was from the second half of march and it downloaded YouTube videos just fine.

[jaimeMF]

It will work again in the next version, I have removed that check because of #5364.
Thanks for the report!