Update app.py

app.py

@@ -1,3 +1,18 @@
-from streamlit_webrtc import webrtc_streamer 
+from streamlit_webrtc import webrtc_streamer, RTCConfiguration
+import av
+import cv2
 
-webrtc_streamer(key='key')
+cascade = cv2.CascadeClassifier("haarcascade_frontalface_default.xml")
+
+class VideoProcessor:
+	def recv(self, frame):
+		frm = frame.to_ndarray(format="bgr24")
+
+		faces = cascade.detectMultiScale(cv2.cvtColor(frm, cv2.COLOR_BGR2GRAY), 1.1, 3)
+
+		for x,y,w,h in faces:
+			cv2.rectangle(frm, (x,y), (x+w, y+h), (0,255,0), 3)
+
+		return av.VideoFrame.from_ndarray(frm, format='bgr24')
+
+webrtc_streamer(key="key", video_processor_factory=VideoProcessor,rtc_configuration= RTCConfiguration{"iceServers": [{"urls": ["stun:stun.l.google.com:19302"]}]})	)