New YouTube signature

[astral2k5]

Hi,

Just came across this video and it has length for some of the videos of 97 (MP4 videos):

http://www.youtube.com/watch?v=QeWBS0JBNzQ

If tried to check this link for 3-4 times, the last time all signatures were 86.

YouTube gets really strange these days...

[FiloSottile]

SIGH

I can't reproduce it, could you run with --verbose and hand me the output when/if you get the 97?

[astral2k5]

It's really random :( now I can't reproduce it either. I'll post the info when it breaks again :)

[yasoob]

this issue is resolved @astral2k5 you can close this issue now and feel free to open a new one if it breaks again.

[FiloSottile]

In this case I'd prefer to keep it open, at least to remember us that 97
s's exist. Hoping for a log.

Filippo Valsorda

[yasoob]

hmm you are right @FiloSottile . I would have helped you guys with youtube as well but unfortunately it is blocked in Pakistan :( and by using VPN i wont be able to make an IE .

[drewm27]

I may have found another one that's broken: http://www.youtube.com/watch?v=DRSRpXPZVdM

[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--verbose', '-t', 'http://www.youtube.com/watch?v=DRSRpXPZVdM']
[debug] youtube-dl version 2013.06.26
[debug] Python version 2.7.3 - Linux-3.8.13-100.fc17.i686-i686-with-fedora-17-Beefy_Miracle
[debug] Proxy map: {}
[youtube] Setting language
[youtube] DRSRpXPZVdM: Downloading video webpage
[youtube] DRSRpXPZVdM: Downloading video info webpage
[youtube] DRSRpXPZVdM: Extracting video information
[youtube] DRSRpXPZVdM: Vevo video detected.
ERROR: Unable to decrypt signature, subkeys lengths not valid; please report this issue on GitHub.
Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/init.py", line 556, in _real_main
cwd=os.path.dirname(os.path.abspath(file)))
File "/usr/lib/python2.7/subprocess.py", line 679, in init
errread, errwrite)
File "/usr/lib/python2.7/subprocess.py", line 1249, in _execute_child
raise child_exception
OSError: [Errno 20] Not a directory: '/usr/local/bin/youtube-dl/youtube_dl'
Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/FileDownloader.py", line 460, in extract_info
ie_result = ie.extract(url)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 91, in extract
return self._real_extract(url)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 508, in _real_extract
signature = self._decrypt_signature(url_data['s'][0])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 137, in _decrypt_signature
raise ExtractorError(u'Unable to decrypt signature, subkeys lengths not valid')
ExtractorError: Unable to decrypt signature, subkeys lengths not valid; please report this issue on GitHub.

[phihag]

@drewm27 You're using an outdated version of youtube-dl, and therefore your issue is unrelated to this one. Type

youtube-dl -U

to update.

[astral2k5]

The download doesn't work again. Seems there is a change for the signature encryption, same length 83 (sometimes there is 81 too) :

http://www.youtube.com/watch?v=HBxt_v0WF6Y

[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--verbose', 'http://www.youtube.com/watch?v=HBxt_v0WF6Y']
[debug] youtube-dl version 2013.07.10
[debug] Python version 2.7.3 - Windows-post2008Server-6.2.9200
[debug] Proxy map: {}
[youtube] Setting language
[youtube] HBxt_v0WF6Y: Downloading video webpage
[youtube] HBxt_v0WF6Y: Downloading video info webpage
[youtube] HBxt_v0WF6Y: Extracting video information
[youtube] HBxt_v0WF6Y: Encrypted signatures detected.
[youtube] encrypted signature length 83 (42.40), itag 46, html5 player vflcaqGO8
[youtube] encrypted signature length 83 (42.40), itag 37, html5 player vflcaqGO8
[youtube] encrypted signature length 83 (42.40), itag 45, html5 player vflcaqGO8
[youtube] encrypted signature length 83 (42.40), itag 22, html5 player vflcaqGO8
[youtube] encrypted signature length 83 (42.40), itag 44, html5 player vflcaqGO8
[youtube] encrypted signature length 81 (40.40), itag 35, html5 player vflcaqGO8
ERROR: Unable to decrypt signature, key length 81 not supported; retrying might work; 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.
Traceback (most recent call last):
File "youtube_dl\YoutubeDL.pyo", line 312, in extract_info
File "youtube_dl\extractor\common.pyo", line 95, in extract
File "youtube_dl\extractor\youtube.pyo", line 590, in _real_extract
File "youtube_dl\extractor\youtube.pyo", line 198, in _decrypt_signature
ExtractorError: Unable to decrypt signature, key length 81 not supported; retrying might work; 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.

[jaimeMF]

@astral2k5 fixed in 85347e1, thanks for the report

[astral2k5]

wow, you are fast! thanks!

[jaimeMF]

The new automatic signature handling added in #1481 should solve this kind of issues, if anyone finds any problem, please open a new issue.