Update app.py

app.py

@@ -41,8 +41,6 @@ with gr.Blocks() as demo:
     gr_video_state = gr.JSON({}, visible=False) # only record video state, belong to gr_state but lightweight
     gr_static_trigger = gr.Number(value=0, visible=False) # control start streaming or stop
     gr_dynamic_trigger = gr.Number(value=0, visible=False) # for continuous refresh 
-
-    gradio_backend = GradioBackend()
     
     with gr.Row():
         with gr.Column():
@@ -76,9 +74,9 @@ with gr.Blocks() as demo:
                 gradio_backend.init_model(device='cuda')
                 state['video_path'] = video_path
                 return gradio_backend(query=message, state=state, mode=mode)
-                
             def gr_chatinterface_chatbot_clear_fn():
                 return {}, {}, 0, 0
+            gradio_backend = GradioBackend()
             gr_chatinterface = gr.ChatInterface(
                 fn=gr_chatinterface_fn,
                 type="messages",