How to get frame matrix from tiler_src_pad_buffer_probe (c deepstream_test3.c) after inference to use it with opencv

I want to modify deepstream_test3 to use my tracker , i need to get frame after detection to insert it into the tracker . my problem that i can’t get the frame in c or c++ codes.

this website solves the similar problem but it’s python / I cant find the same function
n_frame = pyds.get_nvds_buf_surface(hash(gst_buffer), frame_meta.batch_id)
in c codes.

Hi i remamber that Every python code (binding) has a smilair one on c++ , i tested before but i can t remember the link now

pelase refer GitHub - NVIDIA-AI-IOT/deepstream_python_apps: A project demonstrating use of Python for DeepStream sample apps given as a part of SDK (that are currently in C,C++).

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