Update app.py

app.py

@@ -149,8 +149,15 @@ def create_interface():
                 video_output = gr.Video(label="Generated Video")
                 status_output = gr.Textbox(label="Status", interactive=False)
         
+        def on_generate(video_url, audio_url):
+            if not video_url.strip():
+                return None, "Please provide a video URL."
+            if not audio_url.strip():
+                return None, "Please provide an audio URL."
+            return process_video(video_url, audio_url)
+        
         generate_btn.click(
-            fn=process_video,
+            fn=on_generate,
             inputs=[video_url_input, audio_url_input],
             outputs=[video_output, status_output]
         )