Why do I have to add a probe to Nvmultisteamtiler if I want to save frames?

Accelerated Computing Intelligent Video Analytics DeepStream SDK
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• Hardware Platform (Jetson / GPU) Jetson Xavier NX
• DeepStream Version 6.0.1
• JetPack Version (valid for Jetson only) 4.6.1
• TensorRT Version 8.2.1
• NVIDIA GPU Driver Version (valid for GPU only)
• Issue Type( questions, new requirements, bugs)
Hi ,
I have a sample application [deepstream_imagedata-multistream.py](https://github.com/NVIDIA-AI-IOT/deepstream_python_apps/blob/master/apps/deepstream- imagedata-multistream/deepstream_imagedata-multistream.py).
I was able to have rtsp input 4 video frames and save each frame.
So I had one question.
Q:I don’t fully understand the deepstream plugin, but why is the frame saving process done with the Nvmultistreamtiler probe, and why can’t the Nvdsosd probe save frames?

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Closed due to duplicating with Why do you save frames with Nvmultisteamtiler probes?.

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