opencv如何对视频进行编解码

 VideoCapture captRefrnc(“Megamind.avi")

                    ||

                    \/

/*cap.cpp文件*/

CV_IMPL CvCapture * cvCreateFileCapture (const char * filename)
{
    CvCapture * result = 0;

    if (! result)/*首先调用FFMPEG解码*/
        result = cvCreateFileCapture_FFMPEG_proxy (filename);

#ifdef HAVE_XINE
    if (! result)
        result = cvCreateFileCapture_XINE (filename);
#endif

#ifdef HAVE_GSTREAMER
    if (! result)
        result = cvCreateCapture_GStreamer (CV_CAP_GSTREAMER_FILE, filename);
#endif

#ifdef HAVE_QUI