Hi,
Not sure which type CCTV is. Generally we use RTSP source and V4l2 source on Jetson platforms. For python samples, please refer to
Doesn't work nvv4l2decoder for decoding RTSP in gstreamer + opencv - #3 by DaneLLL
V4l2src using OpenCV Gstreamer is not working in Jetson Xavier NX - #3 by DaneLLL
You may try the samples to capture frame data from CCTV. And if it works, it shall be working the same in DeepStream SDK. The pythson samples for DeepStream SDK are in
GitHub - NVIDIA-AI-IOT/deepstream_python_apps: DeepStream SDK Python bindings and sample applications