Update app.py

app.py

@@ -60,6 +60,7 @@ with gr.Blocks() as demo:
                 global infer
                 yield '(initializing model, thanks for waiting...)', state
                 if infer is None:
+                    os.system('pip install flash-attn --no-build-isolation')
                     infer = _init_infer()
                 state['video_path'] = video_path
                 yield '(finished initialization, responding...)', state