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 automatically when a value of the feature is set by the user

CV_CAP_PROP_DC1394_MODE_AUTO = -2,

CV_CAP_PROP_DC1394_MODE_ONE_PUSH_AUTO = -1,

CV_CAP_PROP_POS_MSEC =0,

CV_CAP_PROP_POS_FRAMES =1,

CV_CAP_PROP_POS_AVI_RATIO =2,

CV_CAP_PROP_FRAME_WIDTH =3,

CV_CAP_PROP_FRAME_HEIGHT =4,

CV_CAP_PROP_FPS =5,

CV_CAP_PROP_FOURCC =6,

CV_CAP_PROP_FRAME_COUNT =7,

CV_CAP_PROP_FORMAT =8,

CV_CAP_PROP_MODE =9,

CV_CAP_PROP_BRIGHTNESS =10,

CV_CAP_PROP_CONTRAST =11,

CV_CAP_PROP_SATURATION =12,

CV_CAP_PROP_HUE =13,

CV_CAP_PROP_GAIN =14,

CV_CAP_PROP_EXPOSURE =15,

CV_CAP_PROP_CONVERT_RGB =16,

CV_CAP_PROP_WHITE_BALANCE_BLUE_U =17,

CV_CAP_PROP_RECTIFICATION =18,

CV_CAP_PROP_MONOCROME =19,

CV_CAP_PROP_SHARPNESS =20,

CV_CAP_PROP_AUTO_EXPOSURE =21, // exposure control done by camera,

// user can adjust refernce level

// using this feature

CV_CAP_PROP_GAMMA =22,

CV_CAP_PROP_TEMPERATURE =23,

CV_CAP_PROP_TRIGGER =24,

CV_CAP_PROP_TRIGGER_DELAY =25,

CV_CAP_PROP_WHITE_BALANCE_RED_V =26,

CV_CAP_PROP_MAX_DC1394 =27,

CV_CAP_PROP_AUTOGRAB =1024, // property for highgui class CvCapture_Android only

CV_CAP_PROP_SUPPORTED_PREVIEW_SIZES_STRING=1025, // tricky property, returns cpnst char* indeed

// OpenNI map generators

CV_CAP_OPENNI_DEPTH_GENERATOR = 0,

CV_CAP_OPENNI_IMAGE_GENERATOR = 1 << 31,

CV_CAP_OPENNI_GENERATORS_MASK = 1 << 31,

// Properties of cameras available through OpenNI interfaces

CV_CAP_PROP_OPENNI_OUTPUT_MODE = 100,

CV_CAP_PROP_OPENNI_FRAME_MAX_DEPTH = 101, // in mm

CV_CAP_PROP_OPENNI_BASELINE = 102, // in mm

CV_CAP_PROP_OPENNI_FOCAL_LENGTH = 103, // in pixels

CV_CAP_PROP_OPENNI_REGISTRATION_ON = 104, // flag

CV_CAP_OPENNI_IMAGE_GENERATOR_OUTPUT_MODE = CV_CAP_OPENNI_IMAGE_GENERATOR + CV_CAP_PROP_OPENNI_OUTPUT_MODE,

CV_CAP_OPENNI_DEPTH_GENERATOR_BASELINE = CV_CAP_OPENNI_DEPTH_GENERATOR + CV_CAP_PROP_OPENNI_BASELINE,

CV_CAP_OPENNI_DEPTH_GENERATOR_FOCAL_LENGTH = CV_CAP_OPENNI_DEPTH_GENERATOR + CV_CAP_PROP_OPENNI_FOCAL_LENGTH,

CV_CAP_OPENNI_DEPTH_GENERATOR_REGISTRATION_ON = CV_CAP_OPENNI_DEPTH_GENERATOR + CV_CAP_PROP_OPENNI_REGISTRATION_ON,

// Properties of cameras available through GStreamer interface

CV_CAP_GSTREAMER_QUEUE_LENGTH= 200, // default is 1

CV_CAP_PROP_PVAPI_MULTICASTIP = 300 // ip for anable multicast master mode. 0 for disable multicast

};

参见opencv2.3.1highgui_c.h

CV_CAP_PROP_POS_MSEC - 影片目前位置，为毫秒数或者视频获取时间戳

CV_CAP_PROP_POS_FRAMES - 将被下一步解压/获取的帧索引，以0为起点

CV_CAP_PROP_POS_AVI_RATIO - 视频文件的相对位置（0 - 影片的开始，1 - 影片的结尾)

CV_CAP_PROP_FRAME_WIDTH - 视频流中的帧宽度

CV_CAP_PROP_FRAME_HEIGHT - 视频流中的帧高度

CV_CAP_PROP_FPS - 帧率

CV_CAP_PROP_FOURCC - 表示codec的四个字符

CV_CAP_PROP_FRAME_COUNT - 视频文件中帧的总数

函数cvGetCaptureProperty获得摄像头或者视频文件的指定属性。

//设置跳到指定的帧(快进)

cvSetCaptureProperty(pCapture,CV_CAP_PROP_POS_FRAMES,1000);

//获取视频总帧数

int videoTotalFrames = cvGetCaptureProperty(pCapture,CV_CAP_PROP_FRAME_COUNT);