OpenCV+Visual Studio 2008 - Program runs fine in debug but access violation in regular execution
Question
I'm working on a computer vision program at the moment with OpenCV in C++. It seems to work 100% fine with a live feed from a webcam but when I tried to feed in a stream from an avi file it started crashing with an "Access Violation" error. I can't see why this would be the case because the only difference between the two is the initial frame-grabbing- the image processing is the same afterwards.
I'm developing in VS2008. The curious thing is that when I place a breakpoint in my main() and debug (F5) the program runs fine. However, when I Start Without Debugging (Ctrl+F5) I get the error.
Has anybody encountered a similar problem or would anyone know why my program would appear to work fine when debugging but not in normal execution?
2 answers
solution1
0 2011-04-13 16:34:35
Nothing specific about OpenCV, but the fact that it behaves differently with a different source stream, and in or out of the debugger, makes me think it is a timing issue. You could try attachng the debugger after the crash happens maybe.
solution2
0 ACCPTED 2011-04-13 18:42:39
I would suspect uninitialized variables. Many debuggers initialize all variables, including those that are not.
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