Hi,
For OpenCV, we suggest run gstreamer pipeline in cv2.VideoCapture() like this sample:
Doesn't work nvv4l2decoder for decoding RTSP in gstreamer + opencv - #3 by DaneLLL
If you would like to develop the usecase based on 02_video_dec_cuda
. we suggest use NvEglRenderer
or NvDrmRenderer
instead of OpenCV.