Made sure the stream function used the right predict function.

app.py

@@ -10,7 +10,7 @@ with gr.Blocks() as demo:
             input_img = gr.Image(label="Input", sources="webcam")
         with gr.Column():
             output_lbl = gr.Label(value="Output", label="Expression Prediction")
-        input_img.stream(lambda s: s, inputs=[input_img], outputs=[output_lbl], time_limit=15, stream_every=0.1, concurrency_limit=30)
+        input_img.stream(fn=predict, inputs=[input_img], outputs=[output_lbl], time_limit=15, stream_every=0.1, concurrency_limit=30)
 
 if __name__ == "__main__":