Logging Metadata from Inference Models to File in Graph Composer

Accelerated Computing Intelligent Video Analytics DeepStream SDK
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1

Please provide complete information as applicable to your setup.

Environment Details:
• Hardware Platform (Jetson / GPU) : dGPU (x86_64)
• DeepStream Version : 7.1
• JetPack Version (valid for Jetson only) : N/A
• TensorRT Version : 10.3.0.26
• NVIDIA GPU Driver Version : 560.35.05
• Issue Type : Question

I’m building a simple pipeline in Graph Composer and would like to log all metadata generated by the inference models (PGIE, SGIE) to a file. I’ve gone through the extension development documentation, but the recommended workflow for this use case still isn’t entirely clear.

At this point, my aim is to dump the raw metadata into a log file, ideally by developing a custom extension or plugin. However, I’m unsure how to proceed or which components are needed.

Could you please advise on the following:

  • Is a custom codelet or extension the right approach for capturing and logging inference metadata?
  • What’s the best way to access and filter metadata, especially for relevant detections?
  • Are there any reference examples that show how to log metadata to a file in a custom format?

Any suggestions would be greatly appreciated.

3

If the purpose is to dump the metadata only, you can customize the nvdsvideotemplate library Gst-nvdsvideotemplate — DeepStream documentation. The extension of nvdsvideotemplate NvDsTemplateExt — DeepStream documentation is already in Graph Composer.

4

There is no update from you for a period, assuming this is not an issue anymore. Hence we are closing this topic. If need further support, please open a new one. Thanks