Deep stream 5.0 LPR application not compiling

Accelerated Computing Intelligent Video Analytics DeepStream SDK
1

Hi,

I am trying to test : GitHub - NVIDIA-AI-IOT/deepstream_lpr_app: Sample app code for LPR deployment on DeepStream
On Jetson Xavier NX, with system info :
./jetsonInfo.py
NVIDIA Jetson Xavier NX (Developer Kit Version)
L4T 32.5.1 [ JetPack UNKNOWN ]
Ubuntu 18.04.5 LTS
Kernel Version: 4.9.201-tegra
CUDA 10.2.89
CUDA Architecture: 7.2
OpenCV version: 4.1.1
OpenCV Cuda: NO
CUDNN: 8.0.0.180
TensorRT: 7.1.3.0
Vision Works: 1.6.0.501
VPI: ii libnvvpi1 1.0.15 arm64 NVIDIA Vision Programming Interface library

I have installed and tested :
Deepstream 5.1
And while compiling : make -C nvinfer_custom_lpr_parser
g++ -c -o deepstream_lpr_app.o -fpermissive -Wall -Werror -DPLATFORM_TEGRA -I/opt/nvidia/deepstream/deepstream/sources/includes pkg-config --cflags gstreamer-1.0 -D_GLIBCXX_USE_CXX11_ABI=1 deepstream_lpr_app.c

error1 :
deepstream_lpr_app.c:31:10: fatal error: gstnvdsmeta.h: No such file or directory
#include “gstnvdsmeta.h”
^~~~~~~~~~~~~~~

also error 2: make -C nvinfer_custom_lpr_parser
g++ -o libnvdsinfer_custom_impl_lpr.so nvinfer_custom_lpr_parser.cpp -Wall -Werror -std=c++11 -shared -fPIC -Wno-error=deprecated-declarations -I/opt/nvidia/deepstream/deepstream/sources/includes -Wl,–start-group -lnvinfer -lnvparsers -Wl,–end-group

nvinfer_custom_lpr_parser.cpp:31:10: fatal error: nvdsinfer.h: No such file or directory
#include “nvdsinfer.h”

Is there any version mismach.
or LIBRARY_PATH needs to be added ?

3

You need to correct the path deepstream_lpr_app/Makefile at master · NVIDIA-AI-IOT/deepstream_lpr_app · GitHub to make the compiler find the header files

4

Yes, its the same thing I tried.
I changed the directory as below in the makefile :
CFLAGS+= -I/opt/nvidia/deepstream/deepstream-5.1/sources/includes

Since the deepstream folder I obtained was deepstream-5.1/
But still on make clean and make I was getting same error.
Are there any multiple places where this change has to be done ?
And can you suggest why the -lnvinfer is used in Makefile and how it links to nvdsinfer.h file (because its already present and unidentifiied ) ?

Thanks for the responce.

5

Can you share the error log?

6

Hi @bcao

The issue with compilation is solved.
I used Deepstream SDK 5.1 now with released SD card imge for Xavier Nx.

Im trying to run a custom input.mp4 with H264 format as suggested as :
./deepstream-lpr-app 1 3 0 input.mp4 output.mp4

log obtained :
One element could not be created. Exiting.

  1. Is there any way to solve this issue :
    (As per the source : deepstream_lpr_app.c line 482 , its an issue with GST streammux.)

  2. Also is there a way to detect license plate while capturing/streaming the video ?

Thanks for any help on this…

7

Hey, could you create a new topic for your new issue, we would like one topic to track one issue.

8

Ya definitely.

9

Thanks, so we can close this topic and track your new issue in that topic.

10

Please find the topic created here :