VideoCapture Class

Initializes empty capture. To use this, you should call Open.

Initializes from native pointer

Opens a camera for video capturing

Opens a video file or a capturing device or an IP video stream for video capturing with API Preference

Gets or sets a memory address allocated by AllocMemory.

Gets or sets the byte length of the allocated memory

exposure control done by camera, user can adjust refernce level using this feature [CV_CAP_PROP_AUTO_EXPOSURE]

Gets or sets brightness of image (only for cameras)

Gets the capture type (File or Camera)

Gets or sets contrast of image (only for cameras)

Boolean flags indicating whether images should be converted to RGB

Native pointer of OpenCV structure

Gets or sets a handle which allocates using cvSetData.

Exposure (only for cameras)

The format of the Mat objects returned by retrieve()

Gets or sets 4-character code of codec

Gets or sets frame rate

Gets number of frames in video file

Gets or sets height of frames in the video stream

Gets or sets width of frames in the video stream

Gain of the image (only for cameras)

default is 1 [CV_CAP_GSTREAMER_QUEUE_LENGTH]

Gets or sets hue of image (only for cameras)

Gets a value indicating whether this instance has been disposed.

Gets or sets a value indicating whether you permit disposing this instance.

A backend-specific value indicating the current capture mode

in mm [CV_CAP_PROP_OPENNI_BASELINE]

[CV_CAP_OPENNI_DEPTH_GENERATOR_BASELINE]

[CV_CAP_OPENNI_DEPTH_GENERATOR_FOCAL_LENGTH]

[CV_CAP_OPENNI_DEPTH_GENERATOR_REGISTRATION_ON]

in pixels [CV_CAP_PROP_OPENNI_FOCAL_LENGTH]

in mm [CV_CAP_PROP_OPENNI_FRAME_MAX_DEPTH]

[CV_CAP_OPENNI_IMAGE_GENERATOR_OUTPUT_MODE]

[CV_CAP_PROP_OPENNI_OUTPUT_MODE]

flag that synchronizes the remapping depth map to image map by changing depth generator's view point (if the flag is "on") or sets this view point to its normal one (if the flag is "off"). [CV_CAP_PROP_OPENNI_REGISTRATION]

Gets or sets relative position of video file

Gets or sets 0-based index of the frame to be decoded/captured next

Gets or sets film current position in milliseconds or video capture timestamp

ip for anable multicast master mode. 0 for disable multicast [CV_CAP_PROP_PVAPI_MULTICASTIP]

TOWRITE (note: only supported by DC1394 v 2.x backend currently)

Gets or sets saturation of image (only for cameras)

[CV_CAP_PROP_TEMPERATURE]

Automatic exposure/gain [CV_CAP_PROP_XI_AEAG]

default is 1 [CV_CAP_PROP_XI_AEAG_LEVEL]

Maximum limit of exposure in AEAG procedure [CV_CAP_PROP_XI_AE_MAX_LIMIT]

Maximum limit of gain in AEAG procedure [CV_CAP_PROP_XI_AG_MAX_LIMIT]

Automatic white balance [CV_CAP_PROP_XI_AUTO_WB]

Output data format. [CV_CAP_PROP_XI_DATA_FORMAT]

Change image resolution by binning or skipping. [CV_CAP_PROP_XI_DOWNSAMPLING]

Exposure priority (0.5 - exposure 50%, gain 50%). [CV_CAP_PROP_XI_EXP_PRIORITY]

Get general purpose level [CV_CAP_PROP_XI_GPI_LEVEL]

Set general purpose input mode [CV_CAP_PROP_XI_GPI_MODE]

Selects general purpose input [CV_CAP_PROP_XI_GPI_SELECTOR]

Set general purpose output mode [CV_CAP_PROP_XI_GPO_MODE]

Selects general purpose output [CV_CAP_PROP_XI_GPO_SELECTOR]

Define camera signalling LED functionality [CV_CAP_PROP_XI_LED_MODE]

Selects camera signalling LED [CV_CAP_PROP_XI_LED_SELECTOR]

Calculates White Balance(must be called during acquisition) [CV_CAP_PROP_XI_MANUAL_WB]

Horizontal offset from the origin to the area of interest (in pixels). [CV_CAP_PROP_XI_OFFSET_X]

Vertical offset from the origin to the area of interest (in pixels). [CV_CAP_PROP_XI_OFFSET_Y]

default is 1 [CV_CAP_PROP_XI_TIMEOUT]

Generates an internal trigger. PRM_TRG_SOURCE must be set to TRG_SOFTWARE. [CV_CAP_PROP_XI_TRG_SOFTWARE]

Defines source of trigger. [CV_CAP_PROP_XI_TRG_SOURCE]

Pins the object to be allocated by cvSetData.

Allocates the specified size of memory.

Releases the resources

Releases the resources

Releases managed resources

Releases unmanaged resources

Determines whether the specified object is equal to the current object.

Destructor

Opens a camera for video capturing

Opens a video file or a capturing device or an IP video stream for video capturing with API Preference

Returns the specified VideoCapture property

Returns the specified VideoCapture property

Returns used backend API name. Note that stream should be opened.

query if exception mode is active

Serves as the default hash function.

Gets the Type of the current instance.

Grabs the next frame from video file or capturing device. The method/function grabs the next frame from video file or camera and returns true (non-zero) in the case of success. The primary use of the function is in multi-camera environments, especially when the cameras do not have hardware synchronization. That is, you call VideoCapture::grab() for each camera and after that call the slower method VideoCapture::retrieve() to decode and get frame from each camera. This way the overhead on demosaicing or motion jpeg decompression etc. is eliminated and the retrieved frames from different cameras will be closer in time. Also, when a connected camera is multi-head (for example, a stereo camera or a Kinect device), the correct way of retrieving data from it is to call VideoCapture::grab() first and then call VideoCapture::retrieve() one or more times with different values of the channel parameter.

Returns true if video capturing has been initialized already.

Creates a shallow copy of the current Object.

Notifies the allocated size of memory.

Opens a camera for video capturing

Opens a video file or a capturing device or an IP video stream for video capturing.

Grabs, decodes and returns the next video frame. The method/function combines VideoCapture::grab() and VideoCapture::retrieve() in one call. This is the most convenient method for reading video files or capturing data from decode and returns the just grabbed frame. If no frames has been grabbed (camera has been disconnected, or there are no more frames in video file), the method returns false and the function returns empty image (with %cv::Mat, test it with Mat::empty()).

Grabs, decodes and returns the next video frame. The method/function combines VideoCapture::grab() and VideoCapture::retrieve() in one call. This is the most convenient method for reading video files or capturing data from decode and returns the just grabbed frame. If no frames has been grabbed (camera has been disconnected, or there are no more frames in video file), the method returns false and the function returns empty image (with %cv::Mat, test it with Mat::empty()).

Closes video file or capturing device.

Decodes and returns the grabbed video frame. The method decodes and returns the just grabbed frame. If no frames has been grabbed (camera has been disconnected, or there are no more frames in video file), the method returns false and the function returns an empty image (with %cv::Mat, test it with Mat::empty()).

Decodes and returns the grabbed video frame. The method decodes and returns the just grabbed frame. If no frames has been grabbed (camera has been disconnected, or there are no more frames in video file), the method returns false and the function returns an empty image (with %cv::Mat, test it with Mat::empty()).

Decodes and returns the grabbed video frame. The method decodes and returns the just grabbed frame. If no frames has been grabbed (camera has been disconnected, or there are no more frames in video file), the method returns false and the function returns an empty image (with %cv::Mat, test it with Mat::empty()).

Decodes and returns the grabbed video frame. The method decodes and returns the just grabbed frame. If no frames has been grabbed (camera has been disconnected, or there are no more frames in video file), the method returns false and the function returns an empty image (with %cv::Mat, test it with Mat::empty()).

Decodes and returns the grabbed video frame. The method decodes and returns the just grabbed frame. If no frames has been grabbed (camera has been disconnected, or there are no more frames in video file), the method returns false and the function returns an empty image (with %cv::Mat, test it with Mat::empty()).

Sets a property in the VideoCapture.

Sets a property in the VideoCapture.

Switches exceptions mode. methods raise exceptions if not successful instead of returning an error code

If this object is disposed, then ObjectDisposedException is thrown.

Returns a string that represents the current object.

Data pointer