Pytube: Prefetch gets key error on "url_encoded_fmt_stream_map"

[robly18]

Pytube was working just fine earlier and then, while I was downloading a few videos, it crashed somewhere among the middle, and it hasn't functioned on a single video since, including videos I have successfully downloaded in the past. This applies both to python code, and the command line interface. It crashes on any "YouTube([link])".

The error is the following (always the same):

C:\Users\Robly\talos>pytube v=0XpgchQnaUY --list
Traceback (most recent call last):
  File "c:\code\python3\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\code\python3\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Code\Python3\Scripts\pytube.exe\__main__.py", line 9, in <module>
  File "c:\code\python3\lib\site-packages\pytube\cli.py", line 58, in main
    display_streams(args.url)
  File "c:\code\python3\lib\site-packages\pytube\cli.py", line 182, in display_streams
    yt = YouTube(url)
  File "c:\code\python3\lib\site-packages\pytube\__main__.py", line 81, in __init__
    self.prefetch_init()
  File "c:\code\python3\lib\site-packages\pytube\__main__.py", line 90, in prefetch_init
    self.init()
  File "c:\code\python3\lib\site-packages\pytube\__main__.py", line 117, in init
    mixins.apply_descrambler(self.vid_info, fmt)
  File "c:\code\python3\lib\site-packages\pytube\mixins.py", line 76, in apply_descrambler
    for i in stream_data[key].split(',')
KeyError: 'url_encoded_fmt_stream_map'

[robly18]

Well, I should have tried harder. Upon reinstalling (and apparently my version of pytube was outdated, on version 7.0.18, not sure if that has anything to do with) it started working out of the blue again.

I'm not familliar with GitHub issue etiquette, and I don't know if this might be an actual bug that should be fixed rather than worked around, so I'll leave the post up.

[J0K3RAS]

I have the same problem with you.
My code worked on earlier version of pytube now (on both windows and linux) gives error

Traceback (most recent call last):

  File "<ipython-input-2-af95eab380ae>", line 1, in <module>
    runfile('/home/charalampos/Desktop/downloaderFINAL.py', wdir='/home/charalampos/Desktop')

  File "/usr/lib/python3.6/site-packages/spyder/utils/site/sitecustomize.py", line 710, in runfile
    execfile(filename, namespace)

  File "/usr/lib/python3.6/site-packages/spyder/utils/site/sitecustomize.py", line 101, in execfile
    exec(compile(f.read(), filename, 'exec'), namespace)

  File "/home/charalampos/Desktop/downloaderFINAL.py", line 6, in <module>
    song = YouTube(input("Επικολλήστε εδώ το link του τραγουδιού: \n ---> "))

  File "/usr/lib/python3.6/site-packages/pytube/__main__.py", line 81, in __init__
    self.prefetch_init()

  File "/usr/lib/python3.6/site-packages/pytube/__main__.py", line 90, in prefetch_init
    self.init()

  File "/usr/lib/python3.6/site-packages/pytube/__main__.py", line 117, in init
    mixins.apply_descrambler(self.vid_info, fmt)

  File "/usr/lib/python3.6/site-packages/pytube/mixins.py", line 76, in apply_descrambler
    for i in stream_data[key].split(',')

KeyError: 'url_encoded_fmt_stream_map'

I will try reinstalling pytube...

[J0K3RAS]

Ok. So the problem is witth pytube 7.0.18. Installing the latest version 8.0.X solved the problem

[EdvinAkerstrom]

Still receiving this in pytube 9.0.6

File "...", line 42, in get_audio
    yt = YouTube(url)
  File "/usr/local/lib/python3.6/dist-packages/pytube/__main__.py", line 83, in __init__
    self.prefetch_init()
  File "/usr/local/lib/python3.6/dist-packages/pytube/__main__.py", line 92, in prefetch_init
    self.init()
  File "/usr/local/lib/python3.6/dist-packages/pytube/__main__.py", line 124, in init
    mixins.apply_descrambler(self.player_config_args, fmt)
  File "/usr/local/lib/python3.6/dist-packages/pytube/mixins.py", line 76, in apply_descrambler
    for i in stream_data[key].split(',')
KeyError: 'url_encoded_fmt_stream_map'

[Amecom]

Still receiving this in pytube '9.1.0'

File "...", line 26, in download_local
yt = YouTube("https://www.youtube.com/watch?v=" + id )
File "/usr/local/lib/python3.6/site-packages/pytube/__main__.py", line 84, in __init__
self.prefetch_init()
File "/usr/local/lib/python3.6/site-packages/pytube/__main__.py", line 93, in prefetch_init
self.init()
File "/usr/local/lib/python3.6/site-packages/pytube/__main__.py", line 125, in init
mixins.apply_descrambler(self.player_config_args, fmt)
File "/usr/local/lib/python3.6/site-packages/pytube/mixins.py", line 81, in apply_descrambler
for i in stream_data[key].split(',')
KeyError: 'url_encoded_fmt_stream_map'

[coconutattitude]

Still receiving this on pytube 9.5.3
File "/home/feelthebern/anaconda3/lib/python3.7/site-packages/pytube/mixins.py", line 96, in apply_descrambler
for i in stream_data[key].split(',')
KeyError: 'url_encoded_fmt_stream_map'