What do sink, pad mean in DS python-binding?

Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson / GPU) GPU
• DeepStream Version 6.1
• JetPack Version (valid for Jetson only)
• TensorRT Version
• NVIDIA GPU Driver Version (valid for GPU only) 510
• Issue Type( questions, new requirements, bugs) question

Hi, I’m new to DeepStream’s python binding and want to develop a DS app in Python. I read deepstream_python_apps/apps/deepstream-test{1,3}/deepstream_test_{1,3}.py but it seems weird to me in terms of src, sink and pad. Is there any document explaining these terms in detail? thank you :D

This is standard concept from gstreamer, you can refer it from:
Pads and capabilities , Basic tutorial 3: Dynamic pipelines

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