pytube.exceptions.RegexMatchError：get_throtdling_function_name：找不到多个匹配

我曾经通过以下方式下载歌曲：

from pytube import YouTube
video = YouTube('https://www.youtube.com/watch?v=AWXvSBHB210')
video.streams.get_by_itag(251).download()

从今天开始出现此错误：

Traceback (most recent call last):
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\__main__.py", line 170, in fmt_streams
    extract.apply_signature(stream_manifest, self.vid_info, self.js)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\extract.py", line 409, in apply_signature
    cipher = Cipher(js=js)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\cipher.py", line 43, in __init__
    self.throttling_plan = get_throttling_plan(js)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\cipher.py", line 387, in get_throttling_plan
    raw_code = get_throttling_function_code(js)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\cipher.py", line 293, in get_throttling_function_code
    name = re.escape(get_throttling_function_name(js))
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\cipher.py", line 278, in get_throttling_function_name
    raise RegexMatchError(
pytube.exceptions.RegexMatchError: get_throttling_function_name: could not find match for multiple

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\Me\Documents\YouTubeDownloader.py", line 3, in <module>
    video.streams.get_by_itag(251).download()
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\__main__.py", line 285, in streams
    return StreamQuery(self.fmt_streams)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\__main__.py", line 177, in fmt_streams
    extract.apply_signature(stream_manifest, self.vid_info, self.js)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\extract.py", line 409, in apply_signature
    cipher = Cipher(js=js)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\cipher.py", line 43, in __init__
    self.throttling_plan = get_throttling_plan(js)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\cipher.py", line 387, in get_throttling_plan
    raw_code = get_throttling_function_code(js)
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\cipher.py", line 293, in get_throttling_function_code
    name = re.escape(get_throttling_function_name(js))
  File "C:\Users\Me\AppData\Local\Programs\Python\Python39\lib\site-packages\pytube\cipher.py", line 278, in get_throttling_function_name
    raise RegexMatchError(
pytube.exceptions.RegexMatchError: get_throttling_function_name: could not find match for multiple

此錯誤「pytube.exceptions.RegexMatchError: get_throttling_function_name: could not find match for multiple」表示 PyTube 無法解譯 YouTube 用來提供串流影片的程式碼。這通常發生在 YouTube 變更其程式碼，而 PyTube 還未更新以反映這些變更時。

可以嘗試以下步驟來解決此問題：

1. 更新 PyTube：

確保使用的是最新版本的 PyTube。可以使用 pip 來更新：

bash pip install --upgrade pytube

2. 清除 PyTube 快取：

PyTube 有時會快取 YouTube 頁面的資訊。清除快取可能會解決問題：

python from pytube import YouTube YouTube.clear_cache()

3. 使用不同的 itag 或 streams.filter() ：

有時特定的 itag 可能會失效。請嘗試使用 streams.filter() 方法來尋找具有所需解析度和檔案類型的其他可用串流：

```python from pytube import YouTube

video = YouTube('https://www.youtube.com/watch?v=AWXvSBHB210') # 尋找音訊串流 stream = video.streams.filter(only_audio=True).first() # 或者尋找特定解析度的影片串流 # stream = video.streams.filter(progressive=True, res="720p").first()

stream.download() ```

4. 等待更新：

如果以上方法都不起作用，則 YouTube 可能進行了重大更改，而 PyTube 開發人員尚未發佈更新。可以在 PyTube GitHub 頁面 上查看是否有任何已知問題或更新。

其他建議：

• 檢查的網際網路連線。
• 嘗試重新啟動的 Python 直譯器或電腦。

如果問題仍然存在，可以提供更多上下文資訊，例如 PyTube 版本、作業系統和嘗試下載的影片，以便我可以進一步協助。