Update app.py

app.py

@@ -67,14 +67,15 @@ with gr.Blocks() as demo:
 
             @spaces.GPU
             def gr_chatinterface_fn(message, history, state, video_path, mode):
+                if mode != 'Conversation':
+                    yield 'waiting video input...', state
+                    return
                 global gradio_backend
                 if gradio_backend is None:
                     yield '(ZeroGPU needs to initialize model under @spaces.GPU, thanks for waiting...)', state
                     gradio_backend = GradioBackend()
                     yield '(finished initialization, responding...)', state
                 state['video_path'] = video_path
-                if mode != 'Conversation':
-                    yield 'waiting video input...'
                 response, state = gradio_backend(message=message, history=history, state=state, mode=mode, hf_spaces=hf_spaces)
                 yield response, state