face recognition in flutter using open cv python

I am trying to build face recognition project in mobile apps using flutter. From backend side, I use open cv from python, so there is cv2.VideoCapture(0) to open webcam, the thing that makes me confused is.. is it possible to open camera device from mobile apps using cv2.VideoCapture(0) ? or is there a right way to open camera device from flutter and connect it with backend to do face recognition?