Question

我正在尝试在Fedora 23计算机上编译以下C代码（gcc版本5.3.1 20151207（Red Hat 5.3.1-2）（GCC））并且它没有给出任何错误。程序运行。

然而，当我在Raspberry Pi 1 Model B +（gcc版本4.9.2（Raspbian 4.9.2-10））上编译相同的代码时，编译器没有错误但在运行时崩溃。可能有人弄清楚，哪里是问题？

还附加了调试信息。

/* Compile with
* gcc -lm opencv_video_isolated.c -o ooopencv_video_isolated `pkg-config --cflags --libs opencv`
*/

#include <stdio.h>
#include <opencv2/highgui/highgui.hpp>
#include <opencv/cv.h>
#include <opencv/cxcore.h>
#include <X11/Xlib.h>

    int main()
    {
        CvCapture* capture;

        capture = cvCreateCameraCapture(0);

        IplImage* frame;

        /* Capture a single frame from the video stream */
        frame = cvQueryFrame( capture );


        double ab = frame->depth;
        double ac = frame->width;
        double ad = frame->height;



        return 0;
    }

我也在Raspberry Pi上粘贴了GDB输出。

(gdb) file opencv_video_isolated
Reading symbols from opencv_video_isolated...done.
(gdb) run
Starting program: /home/.../src/opencv_video_isolated 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1".
[New Thread 0xb30ec270 (LWP 1523)]

Program received signal SIGSEGV, Segmentation fault.
0x00012718 in main () at opencv_video_isolated.c:22
22      double ab = frame->depth;
(gdb) backtrace
#0  0x00012718 in main () at opencv_video_isolated.c:22
(gdb)

Answer 1

Program received signal SIGSEGV, Segmentation fault.

您想要print frame。最有可能的是NULL。然后，您需要弄清楚您违反cvQueryFrame或cvCreateCameraCapture的前提条件。

下面的C代码在Fedora上运行，但是在RaspberryPi 1上，会出现分段错误

1 个答案: