OpenCV之python读取视频失败--解决方案
http://zulko.github.io/blog/2013/09/27/read-and-write-video-frames-in-python-using-ffmpeg/
http://www.lfd.uci.edu/~gohlke/pythonlibs/#opencv
http://stackoverflow.com/questions/11699298/opencv-2-4-videocapture-not-working-on-windows