Video bounding boxes are not displayed for an alert

I am integrating savVi (a video analytics software solution from Agent Vi) with Milestone. Milestone and savVi meet installed on different servers. The videos corresponding to some alerts generated from savVi do not show bounding boxes. I have noticed that this behavior occurs when the ObjectId value is 0. I would like to know:

What is the reason why I can not see bounding boxes in some videos corresponding to alerts?

Why is the ObjectId value 0 sometimes?

Please guide to me.

Are you sending in a stream of metadata (and thus expecting to see the bounding boxes on the live videos) or are you sending in events or alarms (and thus the bounding boxes should only show up in the alarms preview)?

Which ObjectId are you referring to?

Thanks for answering. I really developed a web application with AngularJS in which I can view the recordings that I have in Milestone Xprotect VMS. When I review the recordings, in some I can see the bounding boxes, but in others I can not. I noticed that the bounding boxes do not appear when the value of ObjectId is 0.

I believe that the ObjectId is a piece of information that is part of the information for a specific metadata object, just as it happens with the ObjectBirthTime, ObjectDeathTime data. Perhaps the object id refers to the id of the detected object, for example, an object in motion.