following the demo

app.py

@@ -0,0 +1,14 @@
+import gradio as gr
+import numpy as np
+
+def flip(im):
+    return np.flipud(im)
+
+demo = gr.Interface(
+    flip, 
+    gr.Image(sources=["webcam"], streaming=True), 
+    "image",
+    live=True
+)
+
+demo.launch()

requirements.txt

@@ -0,0 +1 @@
+numpy