How to use Python API to runtime multiple RTSP streams？

[maxgameone]

When using a stream is run normally , but multiple streams will be errors may occur 。 as follows

ERROR: Failed to create network using custom network creation function
ERROR: Failed to get cuda engine from custom library API
0:00:10.322330243 3418509 0x3c078530 ERROR nvinfer gstnvinfer.cpp:676:gst_nvinfer_logger: NvDsInferContext[UID 1]: Error in NvDsInferContextImpl::buildModel() <nvdsinfer_context_impl.cpp:2022> [UID = 1]: build engine file failed
0:00:10.537862314 3418509 0x3c078530 ERROR nvinfer gstnvinfer.cpp:676:gst_nvinfer_logger: NvDsInferContext[UID 1]: Error in NvDsInferContextImpl::generateBackendContext() <nvdsinfer_context_impl.cpp:2108> [UID = 1]: build backend context failed
0:00:10.537914508 3418509 0x3c078530 ERROR nvinfer gstnvinfer.cpp:676:gst_nvinfer_logger: NvDsInferContext[UID 1]: Error in NvDsInferContextImpl::initialize() <nvdsinfer_context_impl.cpp:1282> [UID = 1]: generate backend failed, check config file settings
0:00:10.537952749 3418509 0x3c078530 WARN nvinfer gstnvinfer.cpp:898:gst_nvinfer_start: error: Failed to create NvDsInferContext instance
0:00:10.537965934 3418509 0x3c078530 WARN nvinfer gstnvinfer.cpp:898:gst_nvinfer_start: error: Config file path: Person.txt, NvDsInfer Error: NVDSINFER_CONFIG_FAILED
[NvMultiObjectTracker] De-initialized
Error: gst-resource-error-quark: Failed to create NvDsInferContext instance (1): /dvs/git/dirty/git-master_linux/deepstream/sdk/src/gst-plugins/gst-nvinfer/gstnvinfer.cpp(898): gst_nvinfer_start (): /GstPipeline:pipeline0/GstNvInfer:primary-inference:
Config file path: Person.txt, NvDsInfer Error: NVDSINFER_CONFIG_FAILED

How should I edit this config？
THX

[marcoslucianops]

You can refer to deepstream_test3 app provided by NVIDIA. I need a full output log to understand where is the error.