I am following the steps in this site.
I try to build and install 64 bit opencv 2.4.9, ffmpeg 2.4, x264-snapshot-20140912-2245-stable.tar.bz2 @mint maya mate
There is no error during my procedure.
When I run a sample(opencv2.4.9/sample/c/facedetect) to open webcam, I get this image in the window.
But it is fine to load a avi video.
It's a little bit strange.
BTW I can use cheese to get a right result.
Does anyone meets the same problem?