Deepstream_app_sourse1_peoplenet.txt does not work smooth with Jetson nano

Hi,
I want to run deepstream_app_sourse1_peoplenet.txt with usb-camera in order to detect Human body .
so I change [source0] in deepstream_app_sourse1_peoplenet.txt and run it.
I look at the link page. Jetson nano’s fps is 11.

Here is link page

but, my program works very slowly and The screen has often frozen.
Is it need more settings?
Thank you.

1 Change sink type from nveglglessink to nvoverlaysink on Jetson.
2 If the GPU is the performance bottleneck, try increasing the interval at which the primary detector infers on input frames. You can do this by modifying the interval property of [primary-gie] group in the application configuration, or the interval property of the Gst-nvinfer configuration file.

I tried the two solutions you suggested and it worked smooth.
thanks a lot.

but after a short time, following message appears on terminal and fps slows down.

**PERF:  27.28 (29.71)	 

WARNING from sink_sub_bin_sink1: A lot of buffers are being dropped. 

 Debug info: gstbasesink.c(2902): gst_base_sink_is_too_late (): 

 /GstPipeline:pipeline/GstBin:processing_bin_0/GstBin:sink_bin/GstBin:sink_sub_bin1/GstEglGlesSink:sink_sub_bin_sink1: 

There may be a timestamping problem, or this computer is too slow. 

Could you tell me how can it works smooth?

This message coming from gstreamer plugin. refer to this topic.
Gstreamer error - Intelligent Video Analytics / DeepStream SDK - NVIDIA Developer Forums

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