Update app.py

app.py

@@ -252,7 +252,7 @@ def replace_audio_in_video(video_path, new_audio_path, final_video_path):
     logger.info(f"Methods available in VideoFileClip: {dir(video)}")
 
     # Set the new audio
-    video = video.set_audio(new_audio)
+    video = video.with_audio(new_audio)
     
     # Save the final output
     video.write_videofile(final_video_path, codec="libx264", audio_codec="aac")