jetson nano raspberry pi camera not working

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
10

For some reason its not working within ROS
I am just getting the cap.isOpened() as false
camerao pen failed

no debug message also

Please help, thanks

import sys
import cv2
import gi
gi.require_version('Gst', '1.0')
from gi.repository import Gst



class image_converter:

  def __init__(self):
    self.image_pub = rospy.Publisher("image_topic_2",Image,  queue_size=10)
    self.read_cam()
    self.bridge = CvBridge()
    
  def read_cam(self):
    cap = cv2.VideoCapture("nvarguscamerasrc ! video/x-raw(memory:NVMM), width=(int)1280, height=(int)720,format=(string)NV12, framerate=(fraction)30/1 ! nvvidconv ! video/x-raw, format=(string)BGRx ! videoconvert ! video/x-raw, format=(string)BGR ! appsink")
    print(cap.isOpened())
    if cap.isOpened():
	cv2.namedWindow("demo", cv2.WINDOW_AUTOSIZE)
	while True:
	    ret_val, cv_image = cap.read();
	    cv2.imshow('demo',cv_image)
	    
	    try:
	      self.image_pub.publish(self.bridge.cv2_to_imgmsg(cv_image, "bgr8"))
	    except CvBridgeError as e:
	      print(e)

	    if cv2.waitKey(1) == ord('q'):
	      break
    else:
        print ("camera open failed")
        cv2.destroyAllWindows()

def main(args):
  ic = image_converter()
  rospy.init_node('image_converter', anonymous=True)
  try:
    rospy.spin()
  except KeyboardInterrupt:
    print("Shutting down")
  cv2.destroyAllWindows()

if __name__ == '__main__':    
    print(cv2.getBuildInformation())
    Gst.debug_set_active(True)
    Gst.debug_set_default_threshold(5)
    main(sys.argv)
Raspberry pi camera stopped working nvarguscamerasrc0: CANCELLED