Update app.py

app.py

@@ -53,18 +53,20 @@ def check_face(frame):
 
 
 def call(frame):
-
-    img = frame.to_ndarray(format='bgr24')
-
-    check_face(img)
-
-    if face_match:
-        cv2.putText(img, 'Match !', (20, 450), cv2.FONT_HERSHEY_SIMPLEX, 2, (0, 255, 0), 3)
-
+    if frame: 
+        img = frame.to_ndarray(format='bgr24')
+    
+        check_face(img)
+    
+        if face_match:
+            cv2.putText(img, 'Match !', (20, 450), cv2.FONT_HERSHEY_SIMPLEX, 2, (0, 255, 0), 3)
+    
+        else:
+            cv2.putText(img, 'No Match !', (20, 450), cv2.FONT_HERSHEY_SIMPLEX, 2, (0, 0, 255), 3)
+    
+        return av.VideoFrame.from_ndarray(img, format="bgr24")
     else:
-        cv2.putText(img, 'No Match !', (20, 450), cv2.FONT_HERSHEY_SIMPLEX, 2, (0, 0, 255), 3)
-
-    return av.VideoFrame.from_ndarray(img, format="bgr24")
+        st.write('not working ')
 
 
 webrtc_streamer(key='example', video_frame_callback=call)