OPENCV C＆＃x2B;＆＃x2B;损坏的双连锁列表

Question

我正在尝试从多个摄像机中获取FPS。这是主要的：

int main(int argc, char* argv[])
{
    //Load all cameras IP
    map<string, string> camerasIp; //camera ID and Streaming URL
    LoadConfig(&camerasIp);

    //Get FPS of all cameras
    map<string,string>::iterator it_cam;

    while(true)
    {
        for(it_cam = camerasIp.begin(); it_cam != camerasIp.end(); ++it_cam)
        {
            GetCamFps(it_cam->second);
        }

        cout << "" << endl;
    }

    //Send FPS to server
    ...

    return 0;
}

这是getCamfps方法：

void GetCamFps(string url)
{
    cout << "VideoCapture" << endl;
    VideoCapture video(url);

    cout << "Get frames" << endl;
    double fps = video.get(CAP_PROP_FPS);
    cout <<"Frames: " << fps << endl;

    video.release();
}

这是退出：

VideoCapture
Get frames
Frames: 30
VideoCapture
corrupted double-linked list
Aborted (core dumped)

我尝试添加睡眠以在打开一个URL和另一个URL之间让一些时间，但无法正常工作。我检查了地图，这是正确的。

当我评论该方法中的两个第一个cout时，它可以正常工作，但是过了一会儿，它再次失败。

GDB带有backtrace的输出：

Thread 1 "Fps_Monitoring" received signal SIGABRT, Aborted.
__GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
51      ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) backtrace
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#1  0x00007ffff51cc801 in __GI_abort () at abort.c:79
#2  0x00007ffff5215897 in __libc_message (action=action@entry=do_abort, fmt=fmt@entry=0x7ffff5342b9a "%s\n") at ../sysdeps/posix/libc_fatal.c:181
#3  0x00007ffff521c90a in malloc_printerr (str=str@entry=0x7ffff5340cba "corrupted double-linked list") at malloc.c:5350
#4  0x00007ffff521cac4 in malloc_consolidate (av=av@entry=0x7ffff5577c40 <main_arena>) at malloc.c:4456
#5  0x00007ffff52207d8 in _int_malloc (av=av@entry=0x7ffff5577c40 <main_arena>, bytes=bytes@entry=1600) at malloc.c:3703
#6  0x00007ffff52214eb in _int_memalign (av=0x7ffff5577c40 <main_arena>, alignment=64, bytes=<optimized out>) at malloc.c:4694
#7  0x00007ffff5226fba in _mid_memalign (address=<optimized out>, bytes=1496, alignment=<optimized out>) at malloc.c:3314
#8  __posix_memalign (memptr=0x7fffffffdad0, alignment=<optimized out>, size=1496) at malloc.c:5369
#9  0x00007ffff028e7e3 in av_malloc () from /usr/local/lib/libavutil.so.56
#10 0x00007ffff06b253b in avformat_alloc_context () from /usr/local/lib/libavformat.so.58
#11 0x00007ffff5f8b9a3 in CvCapture_FFMPEG::open(char const*) () from /usr/local/lib/libopencv_videoio.so.4.2
#12 0x00007ffff5f8e9ff in cv::cvCreateFileCapture_FFMPEG_proxy(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) ()
   from /usr/local/lib/libopencv_videoio.so.4.2
#13 0x00007ffff5f71566 in cv::StaticBackend::createCapture(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const ()
   from /usr/local/lib/libopencv_videoio.so.4.2
#14 0x00007ffff5f4cc17 in cv::VideoCapture::open(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int) ()
   from /usr/local/lib/libopencv_videoio.so.4.2
#15 0x00007ffff5f4f595 in cv::VideoCapture::VideoCapture(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int) ()
   from /usr/local/lib/libopencv_videoio.so.4.2
#16 0x000055555555f9b3 in GetCamFps(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) ()
#17 0x000055555555d5df in main ()

任何想法，为什么第二个视频帕特尔不起作用？

谢谢。