Use deepstream sdk test3 to read rtsp data, the data is slow 2seconds

use deepstream sdk test3 to read rtsp data, the data is slow 2seconds,
and i add sink g_object_set (G_OBJECT (sink), “sync”, 0, NULL) but no good result. please help

Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson / GPU)
• DeepStream Version
• JetPack Version (valid for Jetson only)
• TensorRT Version
• NVIDIA GPU Driver Version (valid for GPU only)
• Issue Type( questions, new requirements, bugs)
• How to reproduce the issue ? (This is for bugs. Including which sample app is using, the configuration files content, the command line used and other details for reproducing)
• Requirement details( This is for new requirement. Including the module name-for which plugin or for which sample application, the function description)

Hardware Platform (Jetson / GPU) jetson
• DeepStream Version .0
• JetPack Version (valid for Jetson only) 4.6
• TensorRT Version 10.2

Maybe it is RTSP server introduce the latency? Can you conformed it firstly?