OpenCV：VideoCapture无法与DSHOW后端一起使用

Question

I built OpenCV (with mingw 4.9.2 @ Win7Prof64) with CMake switches for WITH_FFMPEG and WITH_DSHOW turned on. When I access a movie file with VideoCapture (fileName) works fine (it uses ffmpeg backend then).

But VideoCapture (fileName, cv::CAP_DSHOW) doesn't work ( isOpened() returns false).

What is missing/ what do I do wrong? Are there any kind of dshow libs/ dlls needed?

Answer 1

至于我在opencv论坛中的副本 ... cv :: CAP_DSHOW未针对文件实现。