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I recently use the pre-built OpenCV 3.1.0 on Windows which was downloaded from here. Actually, I followed the official installation.
The thing is that I find that the VideoCapture module of pre-built OpenCV processes video very slowly. It seems that it has no support of ffmpeg. And I find the official note:

To use the OpenCV library you have two options: Installation by Using the Pre-built Libraries or Installation by Making Your Own Libraries from the Source Files . While the first one is easier to complete, it only works if you are coding with the latest Microsoft Visual Studio IDE and doesn't take advantage of the most advanced technologies we integrate into our library.

It makes me curious about what is the actual build configuration of pre-built OpenCV 3.1.0 (or other versions) on Windows. No supports of TBB, IPP, Eigen, CUDA, etc...? I didn't find any clue on the internet. Anyone knows?

Daniel
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  • There is a file named `opencv_ffmpeg310.dll` or `opencv_ffmpeg310_64.dll` in `C:\opencv-3.1.0\build\bin`. If you are using opencv along with Python you should copy either of them or just both and paste them in `C:\Python27` for example, and check the speed of the video again. – Tes3awy Aug 23 '16 at 16:33
  • I'll try it. But my key point is that the build configuration options of pre-build opencv... – Daniel Aug 24 '16 at 07:12

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