DeepStream & Python test2 &Traking

Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson)
**• DeepStream Version5.1
• JetPack Version (4.5)
**• TensorRT Version7.x
In example 2, I don’t understand the following code very well

Question one
The function of this code is to print out some basic information (such as category, location, etc.) of the target in the past N frames when the tracking target disappears from the video. When the target does not disappear from the video, the code will not be executed.Is my understanding correct?

Question two
On the basis of example 2, how to obtain the tracking ID value of each tracking object in real time?

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guint64 object_id under