How to get the latency from deepstream python apps

[Fiona.Chen]

@skim1

Is there some sample reference to start with writing bindings from deepstream C api to python api?

I think I have shared the sample. deepstream_python_apps/bindings at master · NVIDIA-AI-IOT/deepstream_python_apps (github.com)

@skim1

What I am asking is can’t we get NVDS_LATENCY_MEASUREMENT_META from usermeta from gst_buffer in any of the probe function like other batchmeta, framemeta etc?
Without using nvds_measure_buffer_latency() api??

because NVDS_LATENCY_MEASUREMENT_META is already there in NvDsMetaType.

Yes. You can get NVDS_LATENCY_MEASUREMENT_META user meta from NvDsMetaType. But it should be in the probe function. This special meta will collect the latency information for most deepstream component, the information is time related, so it is meaningful after the data pass through the whole pipeline. If you collect the latency in different place and different time, some component may be missed. Please following the sample.