Using Jetson nano (4GB) running jetson-nano-jp451-sd-card-image using NGC nvcr.io/nvidia/deepstream-l4t:5.1-21.02-samples.
I prepared the model elsewhere, without issue.
Using the above container, added the following software:
apt-get -y update apt-get -y install tree make g++ apt-get -y install libssl1.0.0 libgstreamer1.0-0 libgstreamer1.0-dev gstreamer1.0-tools gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly libgstreamer-plugins-base1.0-dev gstreamer1.0-libav libgstrtspserver-1.0-0 libjansson4=2.11-1
After that I could “make” the application.
Created dict.txt for US plates, per directions.
File “us_car_test2.mp4” is missing from GitHub repo, so I made my own short video (called “LPR.mp4”).
./deepstream-lpr-app 1 1 0 LPR.mp4 out.h264 One element could not be created. Exiting.
Looked through similar problems, found a hint about missing element “nvinfer”. Ran:
gst-inspect-1.0 nvinfer No such element or plugin ‘nvinfer’
Where/how might I get this gadget?