Track ID of Objects extraction

Accelerated Computing Intelligent Video Analytics DeepStream SDK
1

Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson / GPU) Nvidia Jetson Orin Nano
• DeepStream Version 6.3
• JetPack Version (valid for Jetson only) 5.1.2
• TensorRT Version
• NVIDIA GPU Driver Version (valid for GPU only)
• Issue Type( questions, new requirements, bugs)

I want to have the tracking ID of objects in each frame and the time they enter and exit the frame. As far as I understood, we can not have composer GUI on Nvidia Jetson devices, how I can extract those information. Thanks in advance

3

Do you want to save that to a file or display on the screen directly?
You can implement that by yourself.

  1. add a probe function to the src_pad of tracker plugin
  2. record the time when an object’s tracker id appears and disappears
4

Thanks for your reply, could you please tell me in which file and which function I should add this configurations?

5

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

Is the code you are using our demo or your own? Take our deepstream_test2 as an example.
You can add a probe function on the src_pad of the nvtracker plugin.

  GstPad *nvtracker_src_pad = gst_element_get_static_pad (nvtracker, "src");
  if (!nvtracker_src_pad )
    g_print ("Unable to get src pad\n");
  else
    gst_pad_add_probe (nvtracker_src_pad , GST_PAD_PROBE_TYPE_BUFFER,
        nvtracker_src_pad_buffer_probe, NULL, NULL);
  gst_object_unref (nvtracker_src_pad );

Then you can get the object_id in the probe function.

obj_meta->object_id;

Finally, you can count the time when a particular onject_id appears and disappears yourself.

6

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