Deepstream 8.0 Access Gst-nvdsanalytics meta data in Python using Service Maker

[aravindr]

Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson / GPU): GPU
• DeepStream Version: 8.0
• Issue Type( questions, new requirements, bugs)

Does Service Maker for Python have access to RoiMetadata? I am unable to find an example that is able to access AnalyticsObjInfo via Service Maker for Python.

[fanzh]

1. Please refer to getRois in /opt/nvidia/deepstream/deepstream/service-maker/includes/metadata.hpp for how to access RoiMetadata.
2. regarding NvDsAnalyticsObjInfo, in /opt/nvidia/deepstream/deepstream/sources/apps/sample_apps/deepstream-nvdsanalytics-test/deepstream_nvdsanalytics_meta.cpp, you can see NvDsAnalyticsObjInfo is in usermeta of objectmeta. In Python code deepstream_test1.py, you can see object_meta can be accessed via “frame_meta.object_items”, then you may access the nvdsanalytics usermeta via “object_meta.nvdsanalytics_obj_items”, then you may access the AnalyticsObjInfo data via “as_nvdsanalytics_obj” interface. Please refer to the similar code below.

                for user_meta in object_meta.nvdsanalytics_obj_items:
                    AnalyticsObjInfo = user_meta.as_nvdsanalytics_obj

[aravindr]

Thanks for the reply.

How to get the obj_in_roi_cnt from nvdsanalytics_frame? The following crashes the program

for user_meta in object_meta.nvdsanalytics_obj_items:
AnalyticsObjInfo = user_meta.as_nvdsanalytics_obj
AnalyticsFrameMeta = user_meta.as_nvdsanalytics_frame()
print(AnalyticsFrameMeta)

#print(AnalyticsFrameMeta.obj_in_roi_cnt)

[fanzh]

Please refer to the following code.

        for frame_meta in batch_meta.frame_items:
            for  user_meta in frame_meta.nvdsanalytics_frame_items:
                print("frame_items", user_meta.as_nvdsanalytics_frame().obj_in_roi_cnt)
            for object_meta in frame_meta.object_items:
                for user_meta in object_meta.nvdsanalytics_obj_items:
                    if user_meta.as_nvdsanalytics_obj().dir_status:
                        print("obj_items", object_meta.object_id, "is moving in ", user_meta.as_nvdsanalytics_obj().dir_status)

Here is the complete code deepstream_test2.py (5.2 KB) and log log-0929.txt (7.2 KB)
.

[fanzh]

@aravindr Noticing you closed the topic, Did you obtain AnalyticsObjInfo and AnalyticsFrameMeta.obj_in_roi_cnt successfully using the method above? Thank you! Is this still an DeepStream issue to support? Thanks!