列挙型
enum	cv::VideoCaptureAPIs { cv::CAP_ANY = 0 , cv::CAP_VFW = 200 , cv::CAP_V4L = 200 , cv::CAP_V4L2 = CAP_V4L , cv::CAP_FIREWIRE = 300 , cv::CAP_FIREWARE = CAP_FIREWIRE , cv::CAP_IEEE1394 = CAP_FIREWIRE , cv::CAP_DC1394 = CAP_FIREWIRE , cv::CAP_CMU1394 = CAP_FIREWIRE , cv::CAP_QT = 500 , cv::CAP_UNICAP = 600 , cv::CAP_DSHOW = 700 , cv::CAP_PVAPI = 800 , cv::CAP_OPENNI = 900 , cv::CAP_OPENNI_ASUS = 910 , cv::CAP_ANDROID = 1000 , cv::CAP_XIAPI = 1100 , cv::CAP_AVFOUNDATION = 1200 , cv::CAP_GIGANETIX = 1300 , cv::CAP_MSMF = 1400 , cv::CAP_WINRT = 1410 , cv::CAP_INTELPERC = 1500 , cv::CAP_REALSENSE = 1500 , cv::CAP_OPENNI2 = 1600 , cv::CAP_OPENNI2_ASUS = 1610 , cv::CAP_OPENNI2_ASTRA = 1620 , cv::CAP_GPHOTO2 = 1700 , cv::CAP_GSTREAMER = 1800 , cv::CAP_FFMPEG = 1900 , cv::CAP_IMAGES = 2000 , cv::CAP_ARAVIS = 2100 , cv::CAP_OPENCV_MJPEG = 2200 , cv::CAP_INTEL_MFX = 2300 , cv::CAP_XINE = 2400 , cv::CAP_UEYE = 2500 }
	cv::VideoCapture API backends identifier. [詳解]

enum	cv::VideoCaptureProperties { 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 , CAP_PROP_MONOCHROME =19 , CAP_PROP_SHARPNESS =20 , cv::CAP_PROP_AUTO_EXPOSURE =21 , CAP_PROP_GAMMA =22 , CAP_PROP_TEMPERATURE =23 , CAP_PROP_TRIGGER =24 , CAP_PROP_TRIGGER_DELAY =25 , CAP_PROP_WHITE_BALANCE_RED_V =26 , CAP_PROP_ZOOM =27 , CAP_PROP_FOCUS =28 , CAP_PROP_GUID =29 , CAP_PROP_ISO_SPEED =30 , CAP_PROP_BACKLIGHT =32 , CAP_PROP_PAN =33 , CAP_PROP_TILT =34 , CAP_PROP_ROLL =35 , CAP_PROP_IRIS =36 , cv::CAP_PROP_SETTINGS =37 , CAP_PROP_BUFFERSIZE =38 , CAP_PROP_AUTOFOCUS =39 , cv::CAP_PROP_SAR_NUM =40 , cv::CAP_PROP_SAR_DEN =41 , cv::CAP_PROP_BACKEND =42 , cv::CAP_PROP_CHANNEL =43 , cv::CAP_PROP_AUTO_WB =44 , cv::CAP_PROP_WB_TEMPERATURE =45 , cv::CAP_PROP_CODEC_PIXEL_FORMAT =46 , cv::CAP_PROP_BITRATE =47 , cv::CAP_PROP_ORIENTATION_META =48 , cv::CAP_PROP_ORIENTATION_AUTO =49 , cv::CAP_PROP_HW_ACCELERATION =50 , cv::CAP_PROP_HW_DEVICE =51 , cv::CAP_PROP_HW_ACCELERATION_USE_OPENCL =52 , CV__CAP_PROP_LATEST }
	cv::VideoCapture generic properties identifier. [詳解]

enum	cv::VideoWriterProperties { cv::VIDEOWRITER_PROP_QUALITY = 1 , cv::VIDEOWRITER_PROP_FRAMEBYTES = 2 , cv::VIDEOWRITER_PROP_NSTRIPES = 3 , cv::VIDEOWRITER_PROP_IS_COLOR = 4 , cv::VIDEOWRITER_PROP_DEPTH = 5 , cv::VIDEOWRITER_PROP_HW_ACCELERATION = 6 , cv::VIDEOWRITER_PROP_HW_DEVICE = 7 , cv::VIDEOWRITER_PROP_HW_ACCELERATION_USE_OPENCL = 8 , CV__VIDEOWRITER_PROP_LATEST }
	cv::VideoWriter generic properties identifier. [詳解]

詳解

列挙型詳解

◆ VideoCaptureAPIs

enum cv::VideoCaptureAPIs

cv::VideoCapture API backends identifier.

Select preferred API for a capture object. To be used in the VideoCapture::VideoCapture() constructor or VideoCapture::open()

覚え書き: Backends are available only if they have been built with your OpenCV binaries. See videoio_overview for more information.

列挙値
CAP_ANY	Auto detect == 0
CAP_VFW	Video For Windows (obsolete, removed)
CAP_V4L	V4L/V4L2 capturing support
CAP_V4L2	Same as CAP_V4L
CAP_FIREWIRE	IEEE 1394 drivers
CAP_FIREWARE	Same value as CAP_FIREWIRE
CAP_IEEE1394	Same value as CAP_FIREWIRE
CAP_DC1394	Same value as CAP_FIREWIRE
CAP_CMU1394	Same value as CAP_FIREWIRE
CAP_QT	QuickTime (obsolete, removed)
CAP_UNICAP	Unicap drivers (obsolete, removed)
CAP_DSHOW	DirectShow (via videoInput)
CAP_PVAPI	PvAPI, Prosilica GigE SDK
CAP_OPENNI	OpenNI (for Kinect)
CAP_OPENNI_ASUS	OpenNI (for Asus Xtion)
CAP_ANDROID	Android - not used
CAP_XIAPI	XIMEA Camera API
CAP_AVFOUNDATION	AVFoundation framework for iOS (OS X Lion will have the same API)
CAP_GIGANETIX	Smartek Giganetix GigEVisionSDK
CAP_MSMF	Microsoft Media Foundation (via videoInput)
CAP_WINRT	Microsoft Windows Runtime using Media Foundation
CAP_INTELPERC	RealSense (former Intel Perceptual Computing SDK)
CAP_REALSENSE	Synonym for CAP_INTELPERC
CAP_OPENNI2	OpenNI2 (for Kinect)
CAP_OPENNI2_ASUS	OpenNI2 (for Asus Xtion and Occipital Structure sensors)
CAP_OPENNI2_ASTRA	OpenNI2 (for Orbbec Astra)
CAP_GPHOTO2	gPhoto2 connection
CAP_GSTREAMER	GStreamer
CAP_FFMPEG	Open and record video file or stream using the FFMPEG library
CAP_IMAGES	OpenCV Image Sequence (e.g. img_%02d.jpg)
CAP_ARAVIS	Aravis SDK
CAP_OPENCV_MJPEG	Built-in OpenCV MotionJPEG codec
CAP_INTEL_MFX	Intel MediaSDK
CAP_XINE	XINE engine (Linux)
CAP_UEYE	uEye Camera API

◆ VideoCaptureProperties

enum cv::VideoCaptureProperties

cv::VideoCapture generic properties identifier.

Reading / writing properties involves many layers. Some unexpected result might happens along this chain. Effective behaviour depends from device hardware, driver and API Backend.

参照: Additional flags for video I/O API backends, VideoCapture::get(), VideoCapture::set()

列挙値
CAP_PROP_POS_MSEC	Current position of the video file in milliseconds.
CAP_PROP_POS_FRAMES	0-based index of the frame to be decoded/captured next.
CAP_PROP_POS_AVI_RATIO	Relative position of the video file: 0=start of the film, 1=end of the film.
CAP_PROP_FRAME_WIDTH	Width of the frames in the video stream.
CAP_PROP_FRAME_HEIGHT	Height of the frames in the video stream.
CAP_PROP_FPS	Frame rate.
CAP_PROP_FOURCC	4-character code of codec. see VideoWriter::fourcc .
CAP_PROP_FRAME_COUNT	Number of frames in the video file.
CAP_PROP_FORMAT	Format of the Mat objects (see Mat::type()) returned by VideoCapture::retrieve(). Set value -1 to fetch undecoded RAW video streams (as Mat 8UC1).
CAP_PROP_MODE	Backend-specific value indicating the current capture mode.
CAP_PROP_BRIGHTNESS	Brightness of the image (only for those cameras that support).
CAP_PROP_CONTRAST	Contrast of the image (only for cameras).
CAP_PROP_SATURATION	Saturation of the image (only for cameras).
CAP_PROP_HUE	Hue of the image (only for cameras).
CAP_PROP_GAIN	Gain of the image (only for those cameras that support).
CAP_PROP_EXPOSURE	Exposure (only for those cameras that support).
CAP_PROP_CONVERT_RGB	Boolean flags indicating whether images should be converted to RGB. GStreamer note: The flag is ignored in case if custom pipeline is used. It's user responsibility to interpret pipeline output.
CAP_PROP_WHITE_BALANCE_BLUE_U	Currently unsupported.
CAP_PROP_RECTIFICATION	Rectification flag for stereo cameras (note: only supported by DC1394 v 2.x backend currently).
CAP_PROP_AUTO_EXPOSURE	DC1394: exposure control done by camera, user can adjust reference level using this feature.
CAP_PROP_SETTINGS	Pop up video/camera filter dialog (note: only supported by DSHOW backend currently. The property value is ignored)
CAP_PROP_SAR_NUM	Sample aspect ratio: num/den (num)
CAP_PROP_SAR_DEN	Sample aspect ratio: num/den (den)
CAP_PROP_BACKEND	Current backend (enum VideoCaptureAPIs). Read-only property
CAP_PROP_CHANNEL	Video input or Channel Number (only for those cameras that support)
CAP_PROP_AUTO_WB	enable/ disable auto white-balance
CAP_PROP_WB_TEMPERATURE	white-balance color temperature
CAP_PROP_CODEC_PIXEL_FORMAT	(read-only) codec's pixel format. 4-character code - see VideoWriter::fourcc . Subset of AV_PIX_FMT_* or -1 if unknown
CAP_PROP_BITRATE	(read-only) Video bitrate in kbits/s
CAP_PROP_ORIENTATION_META	(read-only) Frame rotation defined by stream meta (applicable for FFmpeg back-end only)
CAP_PROP_ORIENTATION_AUTO	if true - rotates output frames of CvCapture considering video file's metadata (applicable for FFmpeg back-end only) (https://github.com/opencv/opencv/issues/15499)
CAP_PROP_HW_ACCELERATION	(open-only) Hardware acceleration type (see VideoAccelerationType). Setting supported only via `params` parameter in cv::VideoCapture constructor / .open() method. Default value is backend-specific.
CAP_PROP_HW_DEVICE	(open-only) Hardware device index (select GPU if multiple available). Device enumeration is acceleration type specific.
CAP_PROP_HW_ACCELERATION_USE_OPENCL	(open-only) If non-zero, create new OpenCL context and bind it to current thread. The OpenCL context created with Video Acceleration context attached it (if not attached yet) for optimized GPU data copy between HW accelerated decoder and cv::UMat.

◆ VideoWriterProperties

enum cv::VideoWriterProperties

cv::VideoWriter generic properties identifier.

参照: VideoWriter::get(), VideoWriter::set()

列挙値
VIDEOWRITER_PROP_QUALITY	Current quality (0..100%) of the encoded videostream. Can be adjusted dynamically in some codecs.
VIDEOWRITER_PROP_FRAMEBYTES	(Read-only): Size of just encoded video frame. Note that the encoding order may be different from representation order.
VIDEOWRITER_PROP_NSTRIPES	Number of stripes for parallel encoding. -1 for auto detection.
VIDEOWRITER_PROP_IS_COLOR	If it is not zero, the encoder will expect and encode color frames, otherwise it will work with grayscale frames.
VIDEOWRITER_PROP_DEPTH	Defaults to CV_8U.
VIDEOWRITER_PROP_HW_ACCELERATION	(open-only) Hardware acceleration type (see VideoAccelerationType). Setting supported only via `params` parameter in VideoWriter constructor / .open() method. Default value is backend-specific.
VIDEOWRITER_PROP_HW_DEVICE	(open-only) Hardware device index (select GPU if multiple available). Device enumeration is acceleration type specific.
VIDEOWRITER_PROP_HW_ACCELERATION_USE_OPENCL	(open-only) If non-zero, create new OpenCL context and bind it to current thread. The OpenCL context created with Video Acceleration context attached it (if not attached yet) for optimized GPU data copy between cv::UMat and HW accelerated encoder.