通常情況下呼叫cap.set(cv2.cv.CV_CAP_PROP_FPS ,10)是不會起作用的，可以嘗試使用如下方法：
CV_CAP_PROP_FPS is a NOT a fake. See cap_libv4l.cpp(原始碼) in OpenCV github repo. The key is to make sure, you use libv4l over v4l while configuring OpenCV. For that, before running cmake, install libv4l-dev

sudo apt-get install libv4l-dev
 

Now while configuring OpenCV with cmake, enable option, WITH_LIBV4L. If all goes good, in configuration status, you will see some thing similar to below

V4L/V4L2: Using libv4l1 (ver ) / libv4l2 (ver )

And then while building your OpenCV code, you will have to link with libv4l1/libv4l2/libv4lconvert.

Arbitary FPS values at the resolutions you choose, needn’t be supported by your webcam. You may check supported resolutions/fps with a graphical tools like cheese or commands like lsusb (2)

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