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I am trying to write a program that just reads and displays videos. The code runs fine on Windows but not on Linux. My Linux environment is Centos (and Red Hat on a different machine), both 64-bit versions. I have built OpenCV 2.4.9, and made sure that FFMPEG is enabled. In fact, I built FFMPEG from tarball on the Red Hat machine and the install put the libav* files in /usr/local/lib. I have tried to step through the code and it says that when I create the VideoCapture object, the object is invalid. I am completely baffled and will appreciate any ideas on what could be wrong.

On the same machine (and in the same code), I have been able to read a still JPEG image and display it without any issue.

I am trying to write a program that just reads and displays videos. The code runs fine on Windows but not on Linux. My Linux environment is Centos (and Red Hat on a different machine), both 64-bit versions. I have built OpenCV 2.4.9, and made sure that FFMPEG is enabled. In fact, I built FFMPEG from tarball on the Red Hat machine and the install put the libav* files in /usr/local/lib. I have tried to step through the code and it says that when I create the VideoCapture object, the object is invalid. I am completely baffled and will appreciate any ideas on what could be wrong.

On the same machine (and in the same code), I have been able to read a still JPEG image and display it without any issue.

(gdb) n
22              video.open ( VIDEO );
(gdb) p video
$1 = <incomplete type>
(gdb)