Update app.py

app.py

@@ -239,7 +239,9 @@ def process_input(choice, audio_file=None, text_input=None, lang_choice=None, ll
         tuple: The transcription (if audio) and the summary.
     """
     if choice == "Audio":
-        return transcribe_and_summarize(audio_file, lang_choice, llm_choice)
+        if audio_file is not None:
+            return transcribe_and_summarize(audio_file, lang_choice, llm_choice)
+        return "Veuillez fournir une piste audio", ""
     elif choice == "Texte":
         summary_result = summary(content=text_input, choice=llm_choice)
         return "", summary_result[:-10]