Visualize output data with OpenCV

[DaneLLL]

Hi,
It should not work to run imshow in gstdsexample since it is in middle of the pipeline. The pipeline has nvoverlaysink or nveglglessink already. The working case is to link with appsink and call imshow(). Below is a reference sample:

OpenCV Video Capture with GStreamer doesn't work on ROS-melodic

Hi, Once you confirm the source is valid, you may also try this simple code: import sys import cv2 def read_cam(): cap = cv2.VideoCapture("nvarguscamerasrc ! video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080,format=(string)NV12, framerate=(fraction)30/1 ! nvvidconv ! video/x-raw, format=(string)BGRx ! videoconvert ! appsink") if cap.isOpened(): cv2.namedWindow("demo", cv2.WINDOW_AUTOSIZE) while True: ret_val, img = cap.read(); cv2.ims…