Segmentation fault when re-creating the Gstreamer pipeline with nvarguscamerasrc

Segmentation fault when recreating the pipeline with gstreamer on Jetson Nano (using nvarguscamerasrc plugin), below is the debug log. nvcamerasrc used to work previously on old SDKs.

0x0000007fb79ce6f0 in __GI___pthread_mutex_lock (mutex=0x58) at pthread_mutex_lock.c:65
#1 0x0000007fb72ba098 in () at /usr/lib/aarch64-linux-gnu/gstreamer-1.0/
#2 0x0000007fb72b8b60 in () at /usr/lib/aarch64-linux-gnu/gstreamer-1.0/
#3 0x0000007fb7d5498c in () at /usr/lib/aarch64-linux-gnu/
#4 0x0000007fb342e598 in ()

I a, creating the pipeline, destroying and again creating the pipeline. I am doing all the steps in a single program.

hello ram469,

could you please share more details, may I know which JetPack release you’re working with.
please also share the commands that you’re able to see the segmentation fault failure for review.

1 Like

Hi Jerry,
I am using OpenCV, please find the code below. I am trying to create a pipeline and destroy it and again create a new one. In this process, I am experiencing the crash. Thanks for the kind reply.

#include <opencv2/opencv.hpp>
// #include <opencv2/videoio.hpp>
// #include <opencv2/highgui.hpp>

std::string gstreamer_pipeline (int capture_width, int capture_height, int display_width, int display_height, int framerate, int flip_method) {
    return "nvarguscamerasrc ! video/x-raw(memory:NVMM), width=(int)" + std::to_string(capture_width) + ", height=(int)" +
           std::to_string(capture_height) + ", format=(string)NV12, framerate=(fraction)" + std::to_string(framerate) +
           "/1 ! nvvidconv flip-method=" + std::to_string(flip_method) + " ! video/x-raw, width=(int)" + std::to_string(display_width) + ", height=(int)" +
           std::to_string(display_height) + ", format=(string)BGRx ! videoconvert ! video/x-raw, format=(string)BGR ! appsink";

int main()
    int capture_width = 1280 ;
    int capture_height = 720 ;
    int display_width = 1280 ;
    int display_height = 720 ;
    int framerate = 60 ;
    int flip_method = 0 ;

    std::string pipeline = gstreamer_pipeline(capture_width,
    std::cout << "Using pipeline: \n\t" << pipeline << "\n";
   /* Create a VideoCapture element */
    cv::VideoCapture  cap1(pipeline, cv::CAP_GSTREAMER);; 
    if(!cap1.isOpened()) {
	std::cout<<"Failed to open camera."<<std::endl;
	return (-1);
    cap1.release(); // released the first capture element
    /* Create a another VideoCapture element */
    cv::VideoCapture  cap(pipeline, cv::CAP_GSTREAMER);; 
    if(!cap.isOpened()) {
	std::cout<<"Failed to open camera."<<std::endl;
	return (-1);
    if(!cap.isOpened()) {
	std::cout<<"Failed to open camera."<<std::endl;
	return (-1);
    cv::namedWindow("CSI Camera", cv::WINDOW_AUTOSIZE);
    cv::Mat img;

    std::cout << "Hit ESC to exit" << "\n" ;
    	if (! {
		std::cout<<"Capture read error"<<std::endl;
	cv::imshow("CSI Camera",img);
	int keycode = cv::waitKey(30) & 0xff ; 
        if (keycode == 27) break ;

    cv::destroyAllWindows() ;
    return 0;

I am using Jetpack 4.2.

hello ram469,

there’s known issue that nvargus-daemon hang when calling pipeline stop with JetPack-4.2 / l4t-r32.1,
you might upgrade your working process to the latest JetPack release, i.e. JetPack-4.2.2 / l4t-32.2.1
please also check similar discussion thread, Topic 1062196 for reference.

Aprart from upgrading the SDK, I did the second method i.e sent an EOS.

According to the thread you posted, I sent an EOS signal on the bus but no luck.
I used below APIs to do this but no luck still seeing the crash.

gst_bus_post (data->bus,gst_message_new_eos (NULL));

Should there be another way of doing this?

Thanks for the reply.

hello ram469,

it’s a l4t-r32.1 known failure to terminate the pipeline.
since we had significant modifications to fix the issue, suggest upgrade to l4t-r32.2 if it’s possible.

Thanks Jerry.

I am just curious to know whether the old versions are also facing this issue or only this version.