如何使用 pytube 下载 youtube 播放列表视频？

Question

我正在使用 Python 3.8.5。

#pip freeze
    beautifulsoup4==4.9.1
    bs4==0.0.1
    packaging==20.4
    pyparsing==2.4.7
    PyQt5==5.15.0
    PyQt5-sip==12.8.0
    PyQtWebEngine==5.15.0
    pytube3==9.6.4
    sip==5.3.0
    six==1.15.0
    soupsieve==2.0.1
    toml==0.10.1
    typing-extensions==3.7.4.2

代码

from pytube import Playlist
playlist = Playlist('https://www.youtube.com/playlist?list=PL6gx4Cwl9DGCkg2uj3PxUWhMDuTw3VKjM')
print('Number of videos in playlist: %s' % len(playlist.video_urls))
for video_url in playlist.video_urls:
    print(video_url)
    playlist.download_all()

警告

播放列表中的视频数量：0 playlist.py:24: DeprecationWarning: 调用已弃用的函数 download_all（此函数将是 将来删除。请遍历 .videos)。
playlist.download_all() /media/hophoet/Nouveau nom/Projects/python/workspace/automates/autovideo/venv/lib/python3.8/site-packages/pytube/contrib/playlist.py:216： DeprecationWarning：调用已弃用的函数 _path_num_prefix_generator（以后会去掉这个函数）。

Answer 1

根据一些研究，pytube3==9.6.4 和 YouTube 的 HTML 代码之间似乎存在问题。该问题与 pytube3 如何读取 YouTube URL 有关。下面的代码通过使用匹配 YouTube 更新的 HTML 代码的正则表达式解决了这个问题。

import re
from pytube import Playlist

playlist = Playlist("https://www.youtube.com/playlist?list=PL6gx4Cwl9DGCkg2uj3PxUWhMDuTw3VKjM")
playlist._video_regex = re.compile(r"\"url\":\"(/watch\?v=[\w-]*)")
print('Number of videos in playlist: %s' % len(playlist.video_urls))
for url in playlist.video_urls:
   print(url)
   
   ###############################
   OUTPUT
   ###############################
   Number of videos in playlist: 23
   https://www.youtube.com/watch?v=HjuHHI60s44
   https://www.youtube.com/watch?v=Z40N7b9NHTE
   https://www.youtube.com/watch?v=FvziRqkLrEU
   https://www.youtube.com/watch?v=XN2-87haa8k
   https://www.youtube.com/watch?v=VgI4UKyL0Lc
   https://www.youtube.com/watch?v=BvPIgm2SMG8
   https://www.youtube.com/watch?v=DpdmUmglPBA
   https://www.youtube.com/watch?v=BmVmJi5dR9c
   https://www.youtube.com/watch?v=pYNuKXjcriM
   https://www.youtube.com/watch?v=EWONqLqSxYc
   https://www.youtube.com/watch?v=EKmLXiA4zaQ
   https://www.youtube.com/watch?v=-DHCm9AlXvo
   https://www.youtube.com/watch?v=7cRaGaIZQlo
   https://www.youtube.com/watch?v=ZkcEB96iMFk
   https://www.youtube.com/watch?v=5Fcf-8LPvws
   https://www.youtube.com/watch?v=xWLgdSgsBFo
   https://www.youtube.com/watch?v=QcKYFEgfV-I
   https://www.youtube.com/watch?v=BtSQIxDPnLc
   https://www.youtube.com/watch?v=O5kh_-6e4kk
   https://www.youtube.com/watch?v=RuWVDz-48-o
   https://www.youtube.com/watch?v=-yjc5Y7Wbmw
   https://www.youtube.com/watch?v=C5T59WsrNCU
   https://www.youtube.com/watch?v=MWldNGdX9zE

我确实注意到 pytube3 目前不受支持，并且有人将它分叉到 pytubeX。我试图弄清楚下载，因为我无法让该作品与 pytube3 或 pytubex 一起使用。我会继续关注这个问题。