使用Pytube获取YouTube视频标题时出现KeyError错误求助

算力阿峰

2026-6-14

解决Pytube获取YouTube视频标题时的KeyError问题

问题重现

运行以下代码获取YouTube视频标题时，触发KeyError: 'videoDetails'及PytubeError：

from pytube import YouTube

link = input("Enter the video link here ->")

y_tube = YouTube(link)

print(y_tube.title)

执行后报错信息：

Enter the video link here ->https://youtu.be/rkR4sFODnIM?si=FqDP5s3TEDCMStqz
Traceback (most recent call last):
  File "C:\Users\kumar_0nqo0ht\AppData\Local\Programs\Python\Python311\Lib\site-packages\pytube\__main__.py", line 341, in title
    self._title = self.vid_info['videoDetails']['title']
                  ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^
KeyError: 'videoDetails'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "c:\Projects\videodownloader\main.py", line 8, in <module>
    print(f'y_tube.Title->{y_tube.title}')
                           ^^^^^^^^^^^^
  File "C:\Users\kumar_0nqo0ht\AppData\Local\Programs\Python\Python311\Lib\site-packages\pytube\__main__.py", line 346, in title
    raise exceptions.PytubeError(
pytube.exceptions.PytubeError: Exception while accessing title of https://youtube.com/watch?v=rkR4sFODnIM. Please file a bug report at https://github.com/pytube/pytube

解决方案

升级Pytube到最新版本：YouTube会频繁调整接口规则，旧版本Pytube无法适配，执行命令：
```
pip install --upgrade pytube
```
清理链接冗余参数：链接中携带的额外参数（如示例中的?si=FqDP5s3TEDCMStqz）可能干扰解析，简化为纯视频地址即可，比如将原链接改为https://youtu.be/rkR4sFODnIM或https://www.youtube.com/watch?v=rkR4sFODnIM。
禁用缓存机制：Pytube的缓存可能留存旧数据导致解析失败，初始化对象时禁用缓存：
```
y_tube = YouTube(link, use_oauth=False, allow_oauth_cache=False)
```
临时替代方案：若上述方法无效，可手动提取视频ID后尝试调用Pytube内部接口，或更换yt-dlp等替代库完成视频信息获取。