Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson / GPU)
• DeepStream Version
DeepStream 6.1
• JetPack Version (valid for Jetson only)
• TensorRT Version

• NVIDIA GPU Driver Version (valid for GPU only)
CUDA 11.6
• Issue Type( questions, new requirements, bugs)
new requirements
• How to reproduce the issue ? (This is for bugs. Including which sample app is using, the configuration files content, the command line used and other details for reproducing)
• Requirement details( This is for new requirement. Including the module name-for which plugin or for which sample application, the function description)

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As you know, there are many gstreamer elements in pipeline, for example: decoding, videoconvert, inference. these elements can set own gpu-id, you can refer to DeepStream Reference Application - deepstream-app — DeepStream 6.1.1 Release documentation
in this picture, gpu-id is used in source part, like video decoding, will not be set to inference part.
1 you can start multiple processes, only need to modify the configuration file, set different gpu-id.
2 if want to start in one process, you need to modify code, for example: source0 uses gpu0 to decoding and inference, source1 uses gpu1 to decoding and inference.

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