Update app.py

app.py

@@ -487,7 +487,10 @@ def apply_mask(d, b):
             masks[k] = cv2.imread(depths[k]).astype(np.uint8)
             masks[k][dmask<255] = (0,0,0)
 
-    ksize = np.sqrt(np.sum(mask) / 255)
+    ksize = int(np.sqrt(np.sum(mask) / 255))
+    if ksize/2 - int(ksize/2) == 0:
+        ksize = ksize + 1
+        
     frame = cv2.imread(frames[frame_selected]).astype(np.uint8)
     dmask = cv2.GaussianBlur(dmask, (ksize,ksize), 0)
     frame[3] = 255 - dmask