cvGetCaptureProperty
double cvGetCaptureProperty( CvCapture* capture, int property_id );
capture 视频获取结构。
property_id 属性标识。可以是下面之一:
enum
{
// modes of the controlling registers (can be: auto, manual, auto single push, absolute Latter allowed with any other mode)
// every feature can have only one mode turned on at a time
CV_CAP_PROP_DC1394_OFF = -4, //turn the feature off (not controlled manually nor automatically)
CV_CAP_PROP_DC1394_MODE_MANUAL = -3, //set ......
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