Update app.py

app.py

@@ -72,7 +72,6 @@ def download_audio(video_url, quality: str = '128', speed: float = None):
         print('audio_file', audio_file)
         return audio_file
 
-    
 def get_audio(url):
     yt = YouTube(url)
     return yt.streams.filter(only_audio=True)[0].download(filename="tmp.mp4")
@@ -83,7 +82,8 @@ def get_transcript(url, model_size, lang, format):
 
     subtitle = get_subtitle(url, lang)
     print(subtitle)
-    return subtitle
+    if subtitle:
+        return subtitle
 
     model = whisper.load_model(model_size)