transcript_list = YouTubeTranscriptApi.list_transcripts(video_id)

app.py

@@ -291,7 +291,11 @@ def extract_youtube_id(url):
         return None
 
 def get_transcript_by_yt_api(video_id):
-    languages = ['zh-TW', 'zh-Hant', 'zh', 'en-US']  # 優先順序列表
+    transcript_list = YouTubeTranscriptApi.list_transcripts(video_id)
+    languages = []
+    for t in transcript_list:
+        languages.append(t.language_code)
+    
     for language in languages:
         try:
             transcript = YouTubeTranscriptApi.get_transcript(video_id, languages=[language])