Why frame_num is always zero?

Please provide complete information as applicable to your setup.

**• Hardware Platform (Jetson Xavier NX
**• DeepStream Version 5.1
**• JetPack Version 4.5.1
**• TensorRT Version 7.1.3
• NVIDIA GPU Driver Version (valid for GPU only)
**• Issue Type( questions, new requirements, bugs) questions
• 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)

After evaluating deepstream_lpr_app, most of things is good except the following question.

Retrieve frame_meta->frame_num at this line, the value is always 0. However, Retrieve frame_meta->frame_num at this line , the value seems to be good.

• Requirement details( This is for new requirement. Including the module name-for which plugin or for which sample application, the function description)

Is it possible to retrieve a correct frame_meta->frame_num value at this line?

Why you need get it in osd sink probe? Is it possible count frame_num in your application?

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