cv::CAP_PROP_READ_TIMEOUT_MSEC =54 } VideoCapture generic properties identifier. More...
enum cv::VideoWriterProperties {
cv::VIDEOWRITER_PROP_QUALITY = 1, cv::VIDEOWRITER_PROP_FRAMEBYTES = 2, cv::VIDEOWRITER_PROP_NSTRIPES = 3 } VideoWriter generic properties identifier. More...

Detailed Description

Enumeration Type Documentation

◆ VideoCaptureAPIs

#include < opencv2/videoio.hpp >

VideoCapture API backends identifier.

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

Note

Backends are available only if they have been built with your OpenCV binaries. See Video I/O with OpenCV Overview for more information.

Enumerator CAP_ANY

Auto detect == 0.

CAP_VFW

Video For Windows (platform native)

CAP_V4L

V4L/V4L2 capturing support via libv4l.

CAP_V4L2

Same as CAP_V4L.

CAP_FIREWIRE

IEEE 1394 drivers.

CAP_FIREWARE

Same as CAP_FIREWIRE.

CAP_IEEE1394

Same as CAP_FIREWIRE.

CAP_DC1394

Same as CAP_FIREWIRE.

CAP_CMU1394

Same as CAP_FIREWIRE.

CAP_QT

QuickTime.

CAP_UNICAP

Unicap drivers.

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

Intel Perceptual Computing SDK.

CAP_OPENNI2

OpenNI2 (for Kinect)

CAP_OPENNI2_ASUS

OpenNI2 (for Asus Xtion and Occipital Structure sensors)

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)

#include < opencv2/videoio.hpp >

Generic camera output modes identifier.

Note

Currently, these are supported through the libv4l backend only.

Enumerator CAP_MODE_BGR

BGR24 (default)

CAP_MODE_RGB

RGB24.

CAP_MODE_GRAY

Y8.

CAP_MODE_YUYV

YUYV.

#include < opencv2/videoio.hpp >

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.

See also

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

Enumerator 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_MONOCHROME CAP_PROP_SHARPNESS CAP_PROP_AUTO_EXPOSURE

DC1394: exposure control done by camera, user can adjust reference level using this feature.

CAP_PROP_GAMMA CAP_PROP_TEMPERATURE CAP_PROP_TRIGGER CAP_PROP_TRIGGER_DELAY CAP_PROP_WHITE_BALANCE_RED_V CAP_PROP_ZOOM CAP_PROP_FOCUS CAP_PROP_GUID CAP_PROP_ISO_SPEED CAP_PROP_BACKLIGHT CAP_PROP_PAN CAP_PROP_TILT CAP_PROP_ROLL CAP_PROP_IRIS CAP_PROP_SETTINGS

Pop up video/camera filter dialog (note: only supported by DSHOW backend currently. The property value is ignored)

CAP_PROP_BUFFERSIZE CAP_PROP_AUTOFOCUS 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_OPEN_TIMEOUT_MSEC CAP_PROP_READ_TIMEOUT_MSEC

#include < opencv2/videoio.hpp >

VideoWriter generic properties identifier.

See also

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

Enumerator 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.