极简主义VideoCapture示例会产生分段错误

Question

A project I was working on suddenly started giving segmentation faults, even with a version I saved and knew was working.

I investigated a bit, and constructed a small example of what's happening :

#include <opencv2/opencv.hpp>

int main()
{
  cv::VideoCapture capture("drop.avi");
  return 0;
}

According to the documentation , I should be able to do this :

C++: VideoCapture::VideoCapture(const string& filename)

with

filename – name of the opened video file (eg. video.avi) or image sequence

The following compilation command

g++ `pkg-config --cflags opencv` `pkg-config --libs opencv` main.cpp

produces the executable without any warning. However, when I execute the program :

./a.out 
zsh: segmentation fault (core dumped)  ./a.out

According to users of the Interwebs, the issue could be related to ffmpeg and opencv having incompatible versions. The problem is, I don't see that documented anywhere, and I don't want to spend days compiling random versions of opencv, perhaps to no avail.

Does anyone have a clue what's going on ?

Useful information

I am, of course, willing to provide any complementary information that would be needed.

Software versions

• Opencv2 2.4.13-1
• ffmpeg 1:3.1.3-1
• ffmpeg 2.8.7-3

(okay, so apparently I have two versions of ffmpeg ?)

System Information

• OS : Archlinux
• Linux kernel 4.7.2-1

Answer 1

通过安装OpenCV 3.1解决了这个问题