[BUG] KeyError: 'content-length'

Describe the bug The download function in 10.4.1 results in a 'content-length' KeyError.

To Reproduce Here’s my code:

from pytube import YouTube

url = input('URL: ')

yt = YouTube(url)
yt.streams.filter(file_extension='mp4').first().download()

Expected behavior I expect it to download the video.

Output

URL: https://www.youtube.com/watch?v=EbNr015DZbM
Traceback (most recent call last):
  File "C:\Users\cmlsc\Desktop\youtube_download.py", line 7, in <module>
    yt.streams.filter(file_extension='mp4').first().download()
  File "D:\Python38\lib\site-packages\pytube\streams.py", line 251, in download
    bytes_remaining = self.filesize
  File "D:\Python38\lib\site-packages\pytube\streams.py", line 158, in filesize
    self._filesize = request.filesize(self.url)
  File "D:\Python38\lib\site-packages\pytube\request.py", line 127, in filesize
    return int(head(url)["content-length"])
KeyError: 'content-length'

System information Please provide the following information: Python Version: 3.8.6 Pytube Version: 10.4.1 Install Command: D:\Python38\python.exe -m pip install git+https://github.com/pytube/pytube --upgrade

Issue Analytics

State:
Created 3 years ago
Reactions:2
Comments:9

Top GitHub Comments

2reactions

ManasKhoslacommented, Jan 31, 2022

Rather than using “pyt_obj.filesize”, try using “pyt_obj._filesize”. That fixed the “KeyError: ‘content-length’” for me.

I think the issue is in pytube.requests and pytube.streams as both have conflicting keys here

streams.py self._filesize: Optional[int] = int(stream.get('contentLength', 0))

requests.py `@lru_cache() def filesize(url): “”"Fetch size in bytes of file at given URL

:param str url: The URL to get the size of
:returns: int: size in bytes of remote file
"""
return int(head(url)["content-length"])`

1reaction

Robin-Haupt-1commented, Jan 22, 2022

I am also getting the same issue only with the following video, which isn’t a recent video or a livestream:

https://www.youtube.com/watch?v=qT4a73ctcmw

Traceback (most recent call last):
  File "/hdd/Software Engineering/PyCharm/AHC-Archive-Youtube-Videos/download_youtube/import_youtube_video_into_obsidian_main_vault.py", line 214, in <module>
    y._get(x)
  File "/hdd/Software Engineering/PyCharm/AHC-Archive-Youtube-Videos/download_youtube/import_youtube_video_into_obsidian_main_vault.py", line 154, in _get
    saved_video = ffmpeg.input(video_stream.download(output_path=self.temp_folder))
  File "/hdd/Software Engineering/2022/22-01-02 Python 3.10 Shared/venv/lib/python3.10/site-packages/pytube/streams.py", line 247, in download
    bytes_remaining = self.filesize
  File "/hdd/Software Engineering/2022/22-01-02 Python 3.10 Shared/venv/lib/python3.10/site-packages/pytube/streams.py", line 146, in filesize
    self._filesize = request.filesize(self.url)
  File "/hdd/Software Engineering/2022/22-01-02 Python 3.10 Shared/venv/lib/python3.10/site-packages/pytube/request.py", line 200, in filesize
    return int(head(url)["content-length"])
KeyError: 'content-length'