Update app.py

app.py

@@ -143,8 +143,8 @@ def infer(url_in,interpolation,fps_output):
       mag, ang = cv2.cartToPolar(fl[..., 0], fl[..., 1])
       hsv[..., 0] = ang*180/np.pi/2
       hsv[..., 2] = cv2.normalize(mag, None, 0, 255, cv2.NORM_MINMAX)
-      rgba = cv2.cvtColor(hsv, cv2.COLOR_HSV2RGBA)
-      cv2.imshow('fr2', rgba)
+      rgb = cv2.cvtColor(hsv, cv2.COLOR_HSV2RGB)
+      cv2.imshow('fr2', rgb)
       alpha = 1.0/len(frames_list)
       beta = (1.0 - alpha)
       res = cv2.addWeighted(flow, alpha, res, beta, 0.0)