Problem in real time face detection using firebase ML KIT

Question

As per the guide by the Firebase ML KIT and my understanding, we need to grab each frame and convert it into an image or bitmap and then make a FireBaseVision image object and send it to the detector. But my code crashes after the OnPreviewFrame copies to a bitmap object( got this from here Converting preview frame to bitmap) and when I send that bitmap to the FirebaseVisionImage image = FirebaseVisionImage.fromBitmap(bitmap); so can anyone tell me what am I supposed to do. I also want to basically overlay a graphic on face detection in real time you know like snapchat etc