Why can these sources be displayed in one window after configuring multiple sources on deepstream, but yolov5 can only identify one of them

Accelerated Computing Intelligent Video Analytics DeepStream SDK
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Why can these sources be displayed in one window after configuring multiple sources on deepstream, but yolov5 can only identify one of them

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Can this topic be closed as it is duplicated with Why can these sources be displayed in one window after configuring multiple sources on deepstream, but yolov5 can only identify one of them?