Segmentation Fault on using VideoCapture

videocapture

asked 2017-04-16 10:06:34 -0600

updated 2017-04-17 02:20:39 -0600

berak
32993 ●7 ●81 ●312

GDB output:

Starting program: /PWD/a.out

[Thread debugging using libthread_db enabled] Using host libthread_db library "/usr/lib/libthread_db.so.1". [New Thread 0x7fffd9293700 (LWP 1744)]

Thread 1 "a.out" received signal SIGSEGV, Segmentation fault. 0x00007fffe9497370 in av_buffer_unref () from /usr/lib/libavutil.so.55

Machine:

OpenCV - version 3.2.0

ffmpeg - version 3.3

OS - Manjaro Linux

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answered 2019-03-09 09:14:43 -0600

Aaron Michaux
1

I had precisely this problem. Eventually I figured out that OpenCV was failing when it was compiled with Lapack. Don't know why, and don't have time to find out. On Ubuntu, I believe that liblapacke-dev is the package required to configure OpenCV with Lapack. Uninstall this package before compiling and installing OpenCV. Worked for me.