953 lines
52 KiB
C++
953 lines
52 KiB
C++
/*M///////////////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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//
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// By downloading, copying, installing or using the software you agree to this license.
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// If you do not agree to this license, do not download, install,
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// copy or use the software.
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//
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//
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// License Agreement
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// For Open Source Computer Vision Library
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//
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// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
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// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
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// Third party copyrights are property of their respective owners.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// * Redistribution's of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// * Redistribution's in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// * The name of the copyright holders may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// This software is provided by the copyright holders and contributors "as is" and
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// any express or implied warranties, including, but not limited to, the implied
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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// In no event shall the Intel Corporation or contributors be liable for any direct,
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// indirect, incidental, special, exemplary, or consequential damages
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// (including, but not limited to, procurement of substitute goods or services;
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// loss of use, data, or profits; or business interruption) however caused
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// and on any theory of liability, whether in contract, strict liability,
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// or tort (including negligence or otherwise) arising in any way out of
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// the use of this software, even if advised of the possibility of such damage.
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//
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//M*/
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#ifndef OPENCV_VIDEOIO_HPP
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#define OPENCV_VIDEOIO_HPP
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#include "opencv2/core.hpp"
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/**
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@defgroup videoio Video I/O
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@brief Read and write video or images sequence with OpenCV
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### See also:
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- @ref videoio_overview
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- Tutorials: @ref tutorial_table_of_content_videoio
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@{
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@defgroup videoio_flags_base Flags for video I/O
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@defgroup videoio_flags_others Additional flags for video I/O API backends
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@defgroup videoio_c C API for video I/O
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@defgroup videoio_ios iOS glue for video I/O
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@defgroup videoio_winrt WinRT glue for video I/O
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@}
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*/
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////////////////////////////////// video io /////////////////////////////////
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typedef struct CvCapture CvCapture;
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typedef struct CvVideoWriter CvVideoWriter;
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namespace cv
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{
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//! @addtogroup videoio
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//! @{
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//! @addtogroup videoio_flags_base
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//! @{
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/** @brief %VideoCapture API backends identifier.
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Select preferred API for a capture object.
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To be used in the VideoCapture::VideoCapture() constructor or VideoCapture::open()
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@note Backends are available only if they have been built with your OpenCV binaries.
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See @ref videoio_overview for more information.
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*/
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enum VideoCaptureAPIs {
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CAP_ANY = 0, //!< Auto detect == 0
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CAP_VFW = 200, //!< Video For Windows (platform native)
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CAP_V4L = 200, //!< V4L/V4L2 capturing support via libv4l
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CAP_V4L2 = CAP_V4L, //!< Same as CAP_V4L
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CAP_FIREWIRE = 300, //!< IEEE 1394 drivers
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CAP_FIREWARE = CAP_FIREWIRE, //!< Same as CAP_FIREWIRE
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CAP_IEEE1394 = CAP_FIREWIRE, //!< Same as CAP_FIREWIRE
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CAP_DC1394 = CAP_FIREWIRE, //!< Same as CAP_FIREWIRE
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CAP_CMU1394 = CAP_FIREWIRE, //!< Same as CAP_FIREWIRE
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CAP_QT = 500, //!< QuickTime
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CAP_UNICAP = 600, //!< Unicap drivers
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CAP_DSHOW = 700, //!< DirectShow (via videoInput)
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CAP_PVAPI = 800, //!< PvAPI, Prosilica GigE SDK
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CAP_OPENNI = 900, //!< OpenNI (for Kinect)
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CAP_OPENNI_ASUS = 910, //!< OpenNI (for Asus Xtion)
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CAP_ANDROID = 1000, //!< Android - not used
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CAP_XIAPI = 1100, //!< XIMEA Camera API
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CAP_AVFOUNDATION = 1200, //!< AVFoundation framework for iOS (OS X Lion will have the same API)
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CAP_GIGANETIX = 1300, //!< Smartek Giganetix GigEVisionSDK
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CAP_MSMF = 1400, //!< Microsoft Media Foundation (via videoInput)
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CAP_WINRT = 1410, //!< Microsoft Windows Runtime using Media Foundation
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CAP_INTELPERC = 1500, //!< Intel Perceptual Computing SDK
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CAP_OPENNI2 = 1600, //!< OpenNI2 (for Kinect)
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CAP_OPENNI2_ASUS = 1610, //!< OpenNI2 (for Asus Xtion and Occipital Structure sensors)
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CAP_GPHOTO2 = 1700, //!< gPhoto2 connection
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CAP_GSTREAMER = 1800, //!< GStreamer
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CAP_FFMPEG = 1900, //!< Open and record video file or stream using the FFMPEG library
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CAP_IMAGES = 2000, //!< OpenCV Image Sequence (e.g. img_%02d.jpg)
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CAP_ARAVIS = 2100, //!< Aravis SDK
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CAP_OPENCV_MJPEG = 2200, //!< Built-in OpenCV MotionJPEG codec
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CAP_INTEL_MFX = 2300 //!< Intel MediaSDK
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};
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/** @brief %VideoCapture generic properties identifier.
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Reading / writing properties involves many layers. Some unexpected result might happens along this chain.
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Effective behaviour depends from device hardware, driver and API Backend.
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@sa videoio_flags_others, VideoCapture::get(), VideoCapture::set()
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*/
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enum VideoCaptureProperties {
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CAP_PROP_POS_MSEC =0, //!< Current position of the video file in milliseconds.
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CAP_PROP_POS_FRAMES =1, //!< 0-based index of the frame to be decoded/captured next.
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CAP_PROP_POS_AVI_RATIO =2, //!< Relative position of the video file: 0=start of the film, 1=end of the film.
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CAP_PROP_FRAME_WIDTH =3, //!< Width of the frames in the video stream.
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CAP_PROP_FRAME_HEIGHT =4, //!< Height of the frames in the video stream.
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CAP_PROP_FPS =5, //!< Frame rate.
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CAP_PROP_FOURCC =6, //!< 4-character code of codec. see VideoWriter::fourcc .
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CAP_PROP_FRAME_COUNT =7, //!< Number of frames in the video file.
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CAP_PROP_FORMAT =8, //!< Format of the %Mat objects returned by VideoCapture::retrieve().
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CAP_PROP_MODE =9, //!< Backend-specific value indicating the current capture mode.
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CAP_PROP_BRIGHTNESS =10, //!< Brightness of the image (only for those cameras that support).
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CAP_PROP_CONTRAST =11, //!< Contrast of the image (only for cameras).
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CAP_PROP_SATURATION =12, //!< Saturation of the image (only for cameras).
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CAP_PROP_HUE =13, //!< Hue of the image (only for cameras).
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CAP_PROP_GAIN =14, //!< Gain of the image (only for those cameras that support).
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CAP_PROP_EXPOSURE =15, //!< Exposure (only for those cameras that support).
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CAP_PROP_CONVERT_RGB =16, //!< Boolean flags indicating whether images should be converted to RGB.
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CAP_PROP_WHITE_BALANCE_BLUE_U =17, //!< Currently unsupported.
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CAP_PROP_RECTIFICATION =18, //!< Rectification flag for stereo cameras (note: only supported by DC1394 v 2.x backend currently).
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CAP_PROP_MONOCHROME =19,
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CAP_PROP_SHARPNESS =20,
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CAP_PROP_AUTO_EXPOSURE =21, //!< DC1394: exposure control done by camera, user can adjust reference level using this feature.
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CAP_PROP_GAMMA =22,
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CAP_PROP_TEMPERATURE =23,
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CAP_PROP_TRIGGER =24,
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CAP_PROP_TRIGGER_DELAY =25,
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CAP_PROP_WHITE_BALANCE_RED_V =26,
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CAP_PROP_ZOOM =27,
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CAP_PROP_FOCUS =28,
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CAP_PROP_GUID =29,
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CAP_PROP_ISO_SPEED =30,
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CAP_PROP_BACKLIGHT =32,
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CAP_PROP_PAN =33,
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CAP_PROP_TILT =34,
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CAP_PROP_ROLL =35,
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CAP_PROP_IRIS =36,
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CAP_PROP_SETTINGS =37, //!< Pop up video/camera filter dialog (note: only supported by DSHOW backend currently. The property value is ignored)
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CAP_PROP_BUFFERSIZE =38,
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CAP_PROP_AUTOFOCUS =39
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};
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/** @brief Generic camera output modes identifier.
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@note Currently, these are supported through the libv4l backend only.
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*/
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enum VideoCaptureModes {
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CAP_MODE_BGR = 0, //!< BGR24 (default)
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CAP_MODE_RGB = 1, //!< RGB24
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CAP_MODE_GRAY = 2, //!< Y8
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CAP_MODE_YUYV = 3 //!< YUYV
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};
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/** @brief %VideoWriter generic properties identifier.
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@sa VideoWriter::get(), VideoWriter::set()
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*/
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enum VideoWriterProperties {
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VIDEOWRITER_PROP_QUALITY = 1, //!< Current quality (0..100%) of the encoded videostream. Can be adjusted dynamically in some codecs.
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VIDEOWRITER_PROP_FRAMEBYTES = 2, //!< (Read-only): Size of just encoded video frame. Note that the encoding order may be different from representation order.
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VIDEOWRITER_PROP_NSTRIPES = 3 //!< Number of stripes for parallel encoding. -1 for auto detection.
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};
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//! @} videoio_flags_base
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//! @addtogroup videoio_flags_others
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//! @{
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/** @name IEEE 1394 drivers
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@{
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*/
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/** @brief Modes of the IEEE 1394 controlling registers
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(can be: auto, manual, auto single push, absolute Latter allowed with any other mode)
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every feature can have only one mode turned on at a time
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*/
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enum { CAP_PROP_DC1394_OFF = -4, //!< turn the feature off (not controlled manually nor automatically).
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CAP_PROP_DC1394_MODE_MANUAL = -3, //!< set automatically when a value of the feature is set by the user.
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CAP_PROP_DC1394_MODE_AUTO = -2,
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CAP_PROP_DC1394_MODE_ONE_PUSH_AUTO = -1,
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CAP_PROP_DC1394_MAX = 31
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};
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//! @} IEEE 1394 drivers
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/** @name OpenNI (for Kinect)
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@{
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*/
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//! OpenNI map generators
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enum { CAP_OPENNI_DEPTH_GENERATOR = 1 << 31,
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CAP_OPENNI_IMAGE_GENERATOR = 1 << 30,
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CAP_OPENNI_IR_GENERATOR = 1 << 29,
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CAP_OPENNI_GENERATORS_MASK = CAP_OPENNI_DEPTH_GENERATOR + CAP_OPENNI_IMAGE_GENERATOR + CAP_OPENNI_IR_GENERATOR
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};
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//! Properties of cameras available through OpenNI backend
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enum { CAP_PROP_OPENNI_OUTPUT_MODE = 100,
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CAP_PROP_OPENNI_FRAME_MAX_DEPTH = 101, //!< In mm
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CAP_PROP_OPENNI_BASELINE = 102, //!< In mm
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CAP_PROP_OPENNI_FOCAL_LENGTH = 103, //!< In pixels
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CAP_PROP_OPENNI_REGISTRATION = 104, //!< Flag that synchronizes the remapping depth map to image map
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//!< by changing depth generator's view point (if the flag is "on") or
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//!< sets this view point to its normal one (if the flag is "off").
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CAP_PROP_OPENNI_REGISTRATION_ON = CAP_PROP_OPENNI_REGISTRATION,
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CAP_PROP_OPENNI_APPROX_FRAME_SYNC = 105,
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CAP_PROP_OPENNI_MAX_BUFFER_SIZE = 106,
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CAP_PROP_OPENNI_CIRCLE_BUFFER = 107,
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CAP_PROP_OPENNI_MAX_TIME_DURATION = 108,
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CAP_PROP_OPENNI_GENERATOR_PRESENT = 109,
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CAP_PROP_OPENNI2_SYNC = 110,
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CAP_PROP_OPENNI2_MIRROR = 111
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};
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//! OpenNI shortcuts
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enum { CAP_OPENNI_IMAGE_GENERATOR_PRESENT = CAP_OPENNI_IMAGE_GENERATOR + CAP_PROP_OPENNI_GENERATOR_PRESENT,
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CAP_OPENNI_IMAGE_GENERATOR_OUTPUT_MODE = CAP_OPENNI_IMAGE_GENERATOR + CAP_PROP_OPENNI_OUTPUT_MODE,
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CAP_OPENNI_DEPTH_GENERATOR_PRESENT = CAP_OPENNI_DEPTH_GENERATOR + CAP_PROP_OPENNI_GENERATOR_PRESENT,
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CAP_OPENNI_DEPTH_GENERATOR_BASELINE = CAP_OPENNI_DEPTH_GENERATOR + CAP_PROP_OPENNI_BASELINE,
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CAP_OPENNI_DEPTH_GENERATOR_FOCAL_LENGTH = CAP_OPENNI_DEPTH_GENERATOR + CAP_PROP_OPENNI_FOCAL_LENGTH,
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CAP_OPENNI_DEPTH_GENERATOR_REGISTRATION = CAP_OPENNI_DEPTH_GENERATOR + CAP_PROP_OPENNI_REGISTRATION,
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CAP_OPENNI_DEPTH_GENERATOR_REGISTRATION_ON = CAP_OPENNI_DEPTH_GENERATOR_REGISTRATION,
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CAP_OPENNI_IR_GENERATOR_PRESENT = CAP_OPENNI_IR_GENERATOR + CAP_PROP_OPENNI_GENERATOR_PRESENT,
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};
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//! OpenNI data given from depth generator
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enum { CAP_OPENNI_DEPTH_MAP = 0, //!< Depth values in mm (CV_16UC1)
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CAP_OPENNI_POINT_CLOUD_MAP = 1, //!< XYZ in meters (CV_32FC3)
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CAP_OPENNI_DISPARITY_MAP = 2, //!< Disparity in pixels (CV_8UC1)
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CAP_OPENNI_DISPARITY_MAP_32F = 3, //!< Disparity in pixels (CV_32FC1)
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CAP_OPENNI_VALID_DEPTH_MASK = 4, //!< CV_8UC1
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CAP_OPENNI_BGR_IMAGE = 5, //!< Data given from RGB image generator
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CAP_OPENNI_GRAY_IMAGE = 6, //!< Data given from RGB image generator
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CAP_OPENNI_IR_IMAGE = 7 //!< Data given from IR image generator
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};
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//! Supported output modes of OpenNI image generator
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enum { CAP_OPENNI_VGA_30HZ = 0,
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CAP_OPENNI_SXGA_15HZ = 1,
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CAP_OPENNI_SXGA_30HZ = 2,
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CAP_OPENNI_QVGA_30HZ = 3,
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CAP_OPENNI_QVGA_60HZ = 4
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};
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//! @} OpenNI
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/** @name GStreamer
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@{
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*/
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enum { CAP_PROP_GSTREAMER_QUEUE_LENGTH = 200 //!< Default is 1
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};
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//! @} GStreamer
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/** @name PvAPI, Prosilica GigE SDK
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@{
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*/
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//! PVAPI
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enum { CAP_PROP_PVAPI_MULTICASTIP = 300, //!< IP for enable multicast master mode. 0 for disable multicast.
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CAP_PROP_PVAPI_FRAMESTARTTRIGGERMODE = 301, //!< FrameStartTriggerMode: Determines how a frame is initiated.
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CAP_PROP_PVAPI_DECIMATIONHORIZONTAL = 302, //!< Horizontal sub-sampling of the image.
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CAP_PROP_PVAPI_DECIMATIONVERTICAL = 303, //!< Vertical sub-sampling of the image.
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CAP_PROP_PVAPI_BINNINGX = 304, //!< Horizontal binning factor.
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CAP_PROP_PVAPI_BINNINGY = 305, //!< Vertical binning factor.
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CAP_PROP_PVAPI_PIXELFORMAT = 306 //!< Pixel format.
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};
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//! PVAPI: FrameStartTriggerMode
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enum { CAP_PVAPI_FSTRIGMODE_FREERUN = 0, //!< Freerun
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CAP_PVAPI_FSTRIGMODE_SYNCIN1 = 1, //!< SyncIn1
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CAP_PVAPI_FSTRIGMODE_SYNCIN2 = 2, //!< SyncIn2
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CAP_PVAPI_FSTRIGMODE_FIXEDRATE = 3, //!< FixedRate
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CAP_PVAPI_FSTRIGMODE_SOFTWARE = 4 //!< Software
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};
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//! PVAPI: DecimationHorizontal, DecimationVertical
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enum { CAP_PVAPI_DECIMATION_OFF = 1, //!< Off
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CAP_PVAPI_DECIMATION_2OUTOF4 = 2, //!< 2 out of 4 decimation
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CAP_PVAPI_DECIMATION_2OUTOF8 = 4, //!< 2 out of 8 decimation
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CAP_PVAPI_DECIMATION_2OUTOF16 = 8 //!< 2 out of 16 decimation
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};
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//! PVAPI: PixelFormat
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enum { CAP_PVAPI_PIXELFORMAT_MONO8 = 1, //!< Mono8
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CAP_PVAPI_PIXELFORMAT_MONO16 = 2, //!< Mono16
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CAP_PVAPI_PIXELFORMAT_BAYER8 = 3, //!< Bayer8
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CAP_PVAPI_PIXELFORMAT_BAYER16 = 4, //!< Bayer16
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CAP_PVAPI_PIXELFORMAT_RGB24 = 5, //!< Rgb24
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CAP_PVAPI_PIXELFORMAT_BGR24 = 6, //!< Bgr24
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CAP_PVAPI_PIXELFORMAT_RGBA32 = 7, //!< Rgba32
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CAP_PVAPI_PIXELFORMAT_BGRA32 = 8, //!< Bgra32
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};
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//! @} PvAPI
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/** @name XIMEA Camera API
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@{
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*/
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//! Properties of cameras available through XIMEA SDK backend
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enum { CAP_PROP_XI_DOWNSAMPLING = 400, //!< Change image resolution by binning or skipping.
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CAP_PROP_XI_DATA_FORMAT = 401, //!< Output data format.
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CAP_PROP_XI_OFFSET_X = 402, //!< Horizontal offset from the origin to the area of interest (in pixels).
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CAP_PROP_XI_OFFSET_Y = 403, //!< Vertical offset from the origin to the area of interest (in pixels).
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CAP_PROP_XI_TRG_SOURCE = 404, //!< Defines source of trigger.
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CAP_PROP_XI_TRG_SOFTWARE = 405, //!< Generates an internal trigger. PRM_TRG_SOURCE must be set to TRG_SOFTWARE.
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CAP_PROP_XI_GPI_SELECTOR = 406, //!< Selects general purpose input.
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CAP_PROP_XI_GPI_MODE = 407, //!< Set general purpose input mode.
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CAP_PROP_XI_GPI_LEVEL = 408, //!< Get general purpose level.
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CAP_PROP_XI_GPO_SELECTOR = 409, //!< Selects general purpose output.
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CAP_PROP_XI_GPO_MODE = 410, //!< Set general purpose output mode.
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CAP_PROP_XI_LED_SELECTOR = 411, //!< Selects camera signalling LED.
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CAP_PROP_XI_LED_MODE = 412, //!< Define camera signalling LED functionality.
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CAP_PROP_XI_MANUAL_WB = 413, //!< Calculates White Balance(must be called during acquisition).
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CAP_PROP_XI_AUTO_WB = 414, //!< Automatic white balance.
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CAP_PROP_XI_AEAG = 415, //!< Automatic exposure/gain.
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CAP_PROP_XI_EXP_PRIORITY = 416, //!< Exposure priority (0.5 - exposure 50%, gain 50%).
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CAP_PROP_XI_AE_MAX_LIMIT = 417, //!< Maximum limit of exposure in AEAG procedure.
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CAP_PROP_XI_AG_MAX_LIMIT = 418, //!< Maximum limit of gain in AEAG procedure.
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CAP_PROP_XI_AEAG_LEVEL = 419, //!< Average intensity of output signal AEAG should achieve(in %).
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CAP_PROP_XI_TIMEOUT = 420, //!< Image capture timeout in milliseconds.
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CAP_PROP_XI_EXPOSURE = 421, //!< Exposure time in microseconds.
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CAP_PROP_XI_EXPOSURE_BURST_COUNT = 422, //!< Sets the number of times of exposure in one frame.
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CAP_PROP_XI_GAIN_SELECTOR = 423, //!< Gain selector for parameter Gain allows to select different type of gains.
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CAP_PROP_XI_GAIN = 424, //!< Gain in dB.
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CAP_PROP_XI_DOWNSAMPLING_TYPE = 426, //!< Change image downsampling type.
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CAP_PROP_XI_BINNING_SELECTOR = 427, //!< Binning engine selector.
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CAP_PROP_XI_BINNING_VERTICAL = 428, //!< Vertical Binning - number of vertical photo-sensitive cells to combine together.
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CAP_PROP_XI_BINNING_HORIZONTAL = 429, //!< Horizontal Binning - number of horizontal photo-sensitive cells to combine together.
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CAP_PROP_XI_BINNING_PATTERN = 430, //!< Binning pattern type.
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CAP_PROP_XI_DECIMATION_SELECTOR = 431, //!< Decimation engine selector.
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CAP_PROP_XI_DECIMATION_VERTICAL = 432, //!< Vertical Decimation - vertical sub-sampling of the image - reduces the vertical resolution of the image by the specified vertical decimation factor.
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CAP_PROP_XI_DECIMATION_HORIZONTAL = 433, //!< Horizontal Decimation - horizontal sub-sampling of the image - reduces the horizontal resolution of the image by the specified vertical decimation factor.
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CAP_PROP_XI_DECIMATION_PATTERN = 434, //!< Decimation pattern type.
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CAP_PROP_XI_TEST_PATTERN_GENERATOR_SELECTOR = 587, //!< Selects which test pattern generator is controlled by the TestPattern feature.
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CAP_PROP_XI_TEST_PATTERN = 588, //!< Selects which test pattern type is generated by the selected generator.
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CAP_PROP_XI_IMAGE_DATA_FORMAT = 435, //!< Output data format.
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CAP_PROP_XI_SHUTTER_TYPE = 436, //!< Change sensor shutter type(CMOS sensor).
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CAP_PROP_XI_SENSOR_TAPS = 437, //!< Number of taps.
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CAP_PROP_XI_AEAG_ROI_OFFSET_X = 439, //!< Automatic exposure/gain ROI offset X.
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CAP_PROP_XI_AEAG_ROI_OFFSET_Y = 440, //!< Automatic exposure/gain ROI offset Y.
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CAP_PROP_XI_AEAG_ROI_WIDTH = 441, //!< Automatic exposure/gain ROI Width.
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CAP_PROP_XI_AEAG_ROI_HEIGHT = 442, //!< Automatic exposure/gain ROI Height.
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CAP_PROP_XI_BPC = 445, //!< Correction of bad pixels.
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CAP_PROP_XI_WB_KR = 448, //!< White balance red coefficient.
|
|
CAP_PROP_XI_WB_KG = 449, //!< White balance green coefficient.
|
|
CAP_PROP_XI_WB_KB = 450, //!< White balance blue coefficient.
|
|
CAP_PROP_XI_WIDTH = 451, //!< Width of the Image provided by the device (in pixels).
|
|
CAP_PROP_XI_HEIGHT = 452, //!< Height of the Image provided by the device (in pixels).
|
|
CAP_PROP_XI_REGION_SELECTOR = 589, //!< Selects Region in Multiple ROI which parameters are set by width, height, ... ,region mode.
|
|
CAP_PROP_XI_REGION_MODE = 595, //!< Activates/deactivates Region selected by Region Selector.
|
|
CAP_PROP_XI_LIMIT_BANDWIDTH = 459, //!< Set/get bandwidth(datarate)(in Megabits).
|
|
CAP_PROP_XI_SENSOR_DATA_BIT_DEPTH = 460, //!< Sensor output data bit depth.
|
|
CAP_PROP_XI_OUTPUT_DATA_BIT_DEPTH = 461, //!< Device output data bit depth.
|
|
CAP_PROP_XI_IMAGE_DATA_BIT_DEPTH = 462, //!< bitdepth of data returned by function xiGetImage.
|
|
CAP_PROP_XI_OUTPUT_DATA_PACKING = 463, //!< Device output data packing (or grouping) enabled. Packing could be enabled if output_data_bit_depth > 8 and packing capability is available.
|
|
CAP_PROP_XI_OUTPUT_DATA_PACKING_TYPE = 464, //!< Data packing type. Some cameras supports only specific packing type.
|
|
CAP_PROP_XI_IS_COOLED = 465, //!< Returns 1 for cameras that support cooling.
|
|
CAP_PROP_XI_COOLING = 466, //!< Start camera cooling.
|
|
CAP_PROP_XI_TARGET_TEMP = 467, //!< Set sensor target temperature for cooling.
|
|
CAP_PROP_XI_CHIP_TEMP = 468, //!< Camera sensor temperature.
|
|
CAP_PROP_XI_HOUS_TEMP = 469, //!< Camera housing temperature.
|
|
CAP_PROP_XI_HOUS_BACK_SIDE_TEMP = 590, //!< Camera housing back side temperature.
|
|
CAP_PROP_XI_SENSOR_BOARD_TEMP = 596, //!< Camera sensor board temperature.
|
|
CAP_PROP_XI_CMS = 470, //!< Mode of color management system.
|
|
CAP_PROP_XI_APPLY_CMS = 471, //!< Enable applying of CMS profiles to xiGetImage (see XI_PRM_INPUT_CMS_PROFILE, XI_PRM_OUTPUT_CMS_PROFILE).
|
|
CAP_PROP_XI_IMAGE_IS_COLOR = 474, //!< Returns 1 for color cameras.
|
|
CAP_PROP_XI_COLOR_FILTER_ARRAY = 475, //!< Returns color filter array type of RAW data.
|
|
CAP_PROP_XI_GAMMAY = 476, //!< Luminosity gamma.
|
|
CAP_PROP_XI_GAMMAC = 477, //!< Chromaticity gamma.
|
|
CAP_PROP_XI_SHARPNESS = 478, //!< Sharpness Strength.
|
|
CAP_PROP_XI_CC_MATRIX_00 = 479, //!< Color Correction Matrix element [0][0].
|
|
CAP_PROP_XI_CC_MATRIX_01 = 480, //!< Color Correction Matrix element [0][1].
|
|
CAP_PROP_XI_CC_MATRIX_02 = 481, //!< Color Correction Matrix element [0][2].
|
|
CAP_PROP_XI_CC_MATRIX_03 = 482, //!< Color Correction Matrix element [0][3].
|
|
CAP_PROP_XI_CC_MATRIX_10 = 483, //!< Color Correction Matrix element [1][0].
|
|
CAP_PROP_XI_CC_MATRIX_11 = 484, //!< Color Correction Matrix element [1][1].
|
|
CAP_PROP_XI_CC_MATRIX_12 = 485, //!< Color Correction Matrix element [1][2].
|
|
CAP_PROP_XI_CC_MATRIX_13 = 486, //!< Color Correction Matrix element [1][3].
|
|
CAP_PROP_XI_CC_MATRIX_20 = 487, //!< Color Correction Matrix element [2][0].
|
|
CAP_PROP_XI_CC_MATRIX_21 = 488, //!< Color Correction Matrix element [2][1].
|
|
CAP_PROP_XI_CC_MATRIX_22 = 489, //!< Color Correction Matrix element [2][2].
|
|
CAP_PROP_XI_CC_MATRIX_23 = 490, //!< Color Correction Matrix element [2][3].
|
|
CAP_PROP_XI_CC_MATRIX_30 = 491, //!< Color Correction Matrix element [3][0].
|
|
CAP_PROP_XI_CC_MATRIX_31 = 492, //!< Color Correction Matrix element [3][1].
|
|
CAP_PROP_XI_CC_MATRIX_32 = 493, //!< Color Correction Matrix element [3][2].
|
|
CAP_PROP_XI_CC_MATRIX_33 = 494, //!< Color Correction Matrix element [3][3].
|
|
CAP_PROP_XI_DEFAULT_CC_MATRIX = 495, //!< Set default Color Correction Matrix.
|
|
CAP_PROP_XI_TRG_SELECTOR = 498, //!< Selects the type of trigger.
|
|
CAP_PROP_XI_ACQ_FRAME_BURST_COUNT = 499, //!< Sets number of frames acquired by burst. This burst is used only if trigger is set to FrameBurstStart.
|
|
CAP_PROP_XI_DEBOUNCE_EN = 507, //!< Enable/Disable debounce to selected GPI.
|
|
CAP_PROP_XI_DEBOUNCE_T0 = 508, //!< Debounce time (x * 10us).
|
|
CAP_PROP_XI_DEBOUNCE_T1 = 509, //!< Debounce time (x * 10us).
|
|
CAP_PROP_XI_DEBOUNCE_POL = 510, //!< Debounce polarity (pol = 1 t0 - falling edge, t1 - rising edge).
|
|
CAP_PROP_XI_LENS_MODE = 511, //!< Status of lens control interface. This shall be set to XI_ON before any Lens operations.
|
|
CAP_PROP_XI_LENS_APERTURE_VALUE = 512, //!< Current lens aperture value in stops. Examples: 2.8, 4, 5.6, 8, 11.
|
|
CAP_PROP_XI_LENS_FOCUS_MOVEMENT_VALUE = 513, //!< Lens current focus movement value to be used by XI_PRM_LENS_FOCUS_MOVE in motor steps.
|
|
CAP_PROP_XI_LENS_FOCUS_MOVE = 514, //!< Moves lens focus motor by steps set in XI_PRM_LENS_FOCUS_MOVEMENT_VALUE.
|
|
CAP_PROP_XI_LENS_FOCUS_DISTANCE = 515, //!< Lens focus distance in cm.
|
|
CAP_PROP_XI_LENS_FOCAL_LENGTH = 516, //!< Lens focal distance in mm.
|
|
CAP_PROP_XI_LENS_FEATURE_SELECTOR = 517, //!< Selects the current feature which is accessible by XI_PRM_LENS_FEATURE.
|
|
CAP_PROP_XI_LENS_FEATURE = 518, //!< Allows access to lens feature value currently selected by XI_PRM_LENS_FEATURE_SELECTOR.
|
|
CAP_PROP_XI_DEVICE_MODEL_ID = 521, //!< Returns device model id.
|
|
CAP_PROP_XI_DEVICE_SN = 522, //!< Returns device serial number.
|
|
CAP_PROP_XI_IMAGE_DATA_FORMAT_RGB32_ALPHA = 529, //!< The alpha channel of RGB32 output image format.
|
|
CAP_PROP_XI_IMAGE_PAYLOAD_SIZE = 530, //!< Buffer size in bytes sufficient for output image returned by xiGetImage.
|
|
CAP_PROP_XI_TRANSPORT_PIXEL_FORMAT = 531, //!< Current format of pixels on transport layer.
|
|
CAP_PROP_XI_SENSOR_CLOCK_FREQ_HZ = 532, //!< Sensor clock frequency in Hz.
|
|
CAP_PROP_XI_SENSOR_CLOCK_FREQ_INDEX = 533, //!< Sensor clock frequency index. Sensor with selected frequencies have possibility to set the frequency only by this index.
|
|
CAP_PROP_XI_SENSOR_OUTPUT_CHANNEL_COUNT = 534, //!< Number of output channels from sensor used for data transfer.
|
|
CAP_PROP_XI_FRAMERATE = 535, //!< Define framerate in Hz.
|
|
CAP_PROP_XI_COUNTER_SELECTOR = 536, //!< Select counter.
|
|
CAP_PROP_XI_COUNTER_VALUE = 537, //!< Counter status.
|
|
CAP_PROP_XI_ACQ_TIMING_MODE = 538, //!< Type of sensor frames timing.
|
|
CAP_PROP_XI_AVAILABLE_BANDWIDTH = 539, //!< Calculate and returns available interface bandwidth(int Megabits).
|
|
CAP_PROP_XI_BUFFER_POLICY = 540, //!< Data move policy.
|
|
CAP_PROP_XI_LUT_EN = 541, //!< Activates LUT.
|
|
CAP_PROP_XI_LUT_INDEX = 542, //!< Control the index (offset) of the coefficient to access in the LUT.
|
|
CAP_PROP_XI_LUT_VALUE = 543, //!< Value at entry LUTIndex of the LUT.
|
|
CAP_PROP_XI_TRG_DELAY = 544, //!< Specifies the delay in microseconds (us) to apply after the trigger reception before activating it.
|
|
CAP_PROP_XI_TS_RST_MODE = 545, //!< Defines how time stamp reset engine will be armed.
|
|
CAP_PROP_XI_TS_RST_SOURCE = 546, //!< Defines which source will be used for timestamp reset. Writing this parameter will trigger settings of engine (arming).
|
|
CAP_PROP_XI_IS_DEVICE_EXIST = 547, //!< Returns 1 if camera connected and works properly.
|
|
CAP_PROP_XI_ACQ_BUFFER_SIZE = 548, //!< Acquisition buffer size in buffer_size_unit. Default bytes.
|
|
CAP_PROP_XI_ACQ_BUFFER_SIZE_UNIT = 549, //!< Acquisition buffer size unit in bytes. Default 1. E.g. Value 1024 means that buffer_size is in KiBytes.
|
|
CAP_PROP_XI_ACQ_TRANSPORT_BUFFER_SIZE = 550, //!< Acquisition transport buffer size in bytes.
|
|
CAP_PROP_XI_BUFFERS_QUEUE_SIZE = 551, //!< Queue of field/frame buffers.
|
|
CAP_PROP_XI_ACQ_TRANSPORT_BUFFER_COMMIT = 552, //!< Number of buffers to commit to low level.
|
|
CAP_PROP_XI_RECENT_FRAME = 553, //!< GetImage returns most recent frame.
|
|
CAP_PROP_XI_DEVICE_RESET = 554, //!< Resets the camera to default state.
|
|
CAP_PROP_XI_COLUMN_FPN_CORRECTION = 555, //!< Correction of column FPN.
|
|
CAP_PROP_XI_ROW_FPN_CORRECTION = 591, //!< Correction of row FPN.
|
|
CAP_PROP_XI_SENSOR_MODE = 558, //!< Current sensor mode. Allows to select sensor mode by one integer. Setting of this parameter affects: image dimensions and downsampling.
|
|
CAP_PROP_XI_HDR = 559, //!< Enable High Dynamic Range feature.
|
|
CAP_PROP_XI_HDR_KNEEPOINT_COUNT = 560, //!< The number of kneepoints in the PWLR.
|
|
CAP_PROP_XI_HDR_T1 = 561, //!< Position of first kneepoint(in % of XI_PRM_EXPOSURE).
|
|
CAP_PROP_XI_HDR_T2 = 562, //!< Position of second kneepoint (in % of XI_PRM_EXPOSURE).
|
|
CAP_PROP_XI_KNEEPOINT1 = 563, //!< Value of first kneepoint (% of sensor saturation).
|
|
CAP_PROP_XI_KNEEPOINT2 = 564, //!< Value of second kneepoint (% of sensor saturation).
|
|
CAP_PROP_XI_IMAGE_BLACK_LEVEL = 565, //!< Last image black level counts. Can be used for Offline processing to recall it.
|
|
CAP_PROP_XI_HW_REVISION = 571, //!< Returns hardware revision number.
|
|
CAP_PROP_XI_DEBUG_LEVEL = 572, //!< Set debug level.
|
|
CAP_PROP_XI_AUTO_BANDWIDTH_CALCULATION = 573, //!< Automatic bandwidth calculation.
|
|
CAP_PROP_XI_FFS_FILE_ID = 594, //!< File number.
|
|
CAP_PROP_XI_FFS_FILE_SIZE = 580, //!< Size of file.
|
|
CAP_PROP_XI_FREE_FFS_SIZE = 581, //!< Size of free camera FFS.
|
|
CAP_PROP_XI_USED_FFS_SIZE = 582, //!< Size of used camera FFS.
|
|
CAP_PROP_XI_FFS_ACCESS_KEY = 583, //!< Setting of key enables file operations on some cameras.
|
|
CAP_PROP_XI_SENSOR_FEATURE_SELECTOR = 585, //!< Selects the current feature which is accessible by XI_PRM_SENSOR_FEATURE_VALUE.
|
|
CAP_PROP_XI_SENSOR_FEATURE_VALUE = 586, //!< Allows access to sensor feature value currently selected by XI_PRM_SENSOR_FEATURE_SELECTOR.
|
|
};
|
|
|
|
//! @} XIMEA
|
|
|
|
/** @name AVFoundation framework for iOS
|
|
OS X Lion will have the same API
|
|
@{
|
|
*/
|
|
|
|
//! Properties of cameras available through AVFOUNDATION backend
|
|
enum { CAP_PROP_IOS_DEVICE_FOCUS = 9001,
|
|
CAP_PROP_IOS_DEVICE_EXPOSURE = 9002,
|
|
CAP_PROP_IOS_DEVICE_FLASH = 9003,
|
|
CAP_PROP_IOS_DEVICE_WHITEBALANCE = 9004,
|
|
CAP_PROP_IOS_DEVICE_TORCH = 9005
|
|
};
|
|
|
|
/** @name Smartek Giganetix GigEVisionSDK
|
|
@{
|
|
*/
|
|
|
|
//! Properties of cameras available through Smartek Giganetix Ethernet Vision backend
|
|
/* --- Vladimir Litvinenko (litvinenko.vladimir@gmail.com) --- */
|
|
enum { CAP_PROP_GIGA_FRAME_OFFSET_X = 10001,
|
|
CAP_PROP_GIGA_FRAME_OFFSET_Y = 10002,
|
|
CAP_PROP_GIGA_FRAME_WIDTH_MAX = 10003,
|
|
CAP_PROP_GIGA_FRAME_HEIGH_MAX = 10004,
|
|
CAP_PROP_GIGA_FRAME_SENS_WIDTH = 10005,
|
|
CAP_PROP_GIGA_FRAME_SENS_HEIGH = 10006
|
|
};
|
|
|
|
//! @} Smartek
|
|
|
|
/** @name Intel Perceptual Computing SDK
|
|
@{
|
|
*/
|
|
enum { CAP_PROP_INTELPERC_PROFILE_COUNT = 11001,
|
|
CAP_PROP_INTELPERC_PROFILE_IDX = 11002,
|
|
CAP_PROP_INTELPERC_DEPTH_LOW_CONFIDENCE_VALUE = 11003,
|
|
CAP_PROP_INTELPERC_DEPTH_SATURATION_VALUE = 11004,
|
|
CAP_PROP_INTELPERC_DEPTH_CONFIDENCE_THRESHOLD = 11005,
|
|
CAP_PROP_INTELPERC_DEPTH_FOCAL_LENGTH_HORZ = 11006,
|
|
CAP_PROP_INTELPERC_DEPTH_FOCAL_LENGTH_VERT = 11007
|
|
};
|
|
|
|
//! Intel Perceptual Streams
|
|
enum { CAP_INTELPERC_DEPTH_GENERATOR = 1 << 29,
|
|
CAP_INTELPERC_IMAGE_GENERATOR = 1 << 28,
|
|
CAP_INTELPERC_GENERATORS_MASK = CAP_INTELPERC_DEPTH_GENERATOR + CAP_INTELPERC_IMAGE_GENERATOR
|
|
};
|
|
|
|
enum { CAP_INTELPERC_DEPTH_MAP = 0, //!< Each pixel is a 16-bit integer. The value indicates the distance from an object to the camera's XY plane or the Cartesian depth.
|
|
CAP_INTELPERC_UVDEPTH_MAP = 1, //!< Each pixel contains two 32-bit floating point values in the range of 0-1, representing the mapping of depth coordinates to the color coordinates.
|
|
CAP_INTELPERC_IR_MAP = 2, //!< Each pixel is a 16-bit integer. The value indicates the intensity of the reflected laser beam.
|
|
CAP_INTELPERC_IMAGE = 3
|
|
};
|
|
|
|
//! @} Intel Perceptual
|
|
|
|
/** @name gPhoto2 connection
|
|
@{
|
|
*/
|
|
|
|
/** @brief gPhoto2 properties
|
|
|
|
If `propertyId` is less than 0 then work on widget with that __additive inversed__ camera setting ID
|
|
Get IDs by using CAP_PROP_GPHOTO2_WIDGET_ENUMERATE.
|
|
@see CvCaptureCAM_GPHOTO2 for more info
|
|
*/
|
|
enum { CAP_PROP_GPHOTO2_PREVIEW = 17001, //!< Capture only preview from liveview mode.
|
|
CAP_PROP_GPHOTO2_WIDGET_ENUMERATE = 17002, //!< Readonly, returns (const char *).
|
|
CAP_PROP_GPHOTO2_RELOAD_CONFIG = 17003, //!< Trigger, only by set. Reload camera settings.
|
|
CAP_PROP_GPHOTO2_RELOAD_ON_CHANGE = 17004, //!< Reload all settings on set.
|
|
CAP_PROP_GPHOTO2_COLLECT_MSGS = 17005, //!< Collect messages with details.
|
|
CAP_PROP_GPHOTO2_FLUSH_MSGS = 17006, //!< Readonly, returns (const char *).
|
|
CAP_PROP_SPEED = 17007, //!< Exposure speed. Can be readonly, depends on camera program.
|
|
CAP_PROP_APERTURE = 17008, //!< Aperture. Can be readonly, depends on camera program.
|
|
CAP_PROP_EXPOSUREPROGRAM = 17009, //!< Camera exposure program.
|
|
CAP_PROP_VIEWFINDER = 17010 //!< Enter liveview mode.
|
|
};
|
|
|
|
//! @} gPhoto2
|
|
|
|
|
|
/** @name Images backend
|
|
@{
|
|
*/
|
|
|
|
/** @brief Images backend properties
|
|
|
|
*/
|
|
enum { CAP_PROP_IMAGES_BASE = 18000,
|
|
CAP_PROP_IMAGES_LAST = 19000 // excluding
|
|
};
|
|
|
|
//! @} Images
|
|
|
|
//! @} videoio_flags_others
|
|
|
|
|
|
class IVideoCapture;
|
|
|
|
/** @brief Class for video capturing from video files, image sequences or cameras.
|
|
|
|
The class provides C++ API for capturing video from cameras or for reading video files and image sequences.
|
|
|
|
Here is how the class can be used:
|
|
@include samples/cpp/videocapture_basic.cpp
|
|
|
|
@note In @ref videoio_c "C API" the black-box structure `CvCapture` is used instead of %VideoCapture.
|
|
@note
|
|
- (C++) A basic sample on using the %VideoCapture interface can be found at
|
|
`OPENCV_SOURCE_CODE/samples/cpp/videocapture_starter.cpp`
|
|
- (Python) A basic sample on using the %VideoCapture interface can be found at
|
|
`OPENCV_SOURCE_CODE/samples/python/video.py`
|
|
- (Python) A multi threaded video processing sample can be found at
|
|
`OPENCV_SOURCE_CODE/samples/python/video_threaded.py`
|
|
- (Python) %VideoCapture sample showcasing some features of the Video4Linux2 backend
|
|
`OPENCV_SOURCE_CODE/samples/python/video_v4l2.py`
|
|
*/
|
|
class CV_EXPORTS_W VideoCapture
|
|
{
|
|
public:
|
|
/** @brief Default constructor
|
|
@note In @ref videoio_c "C API", when you finished working with video, release CvCapture structure with
|
|
cvReleaseCapture(), or use Ptr\<CvCapture\> that calls cvReleaseCapture() automatically in the
|
|
destructor.
|
|
*/
|
|
CV_WRAP VideoCapture();
|
|
|
|
/** @overload
|
|
@brief Open video file or a capturing device or a IP video stream for video capturing
|
|
|
|
Same as VideoCapture(const String& filename, int apiPreference) but using default Capture API backends
|
|
*/
|
|
CV_WRAP VideoCapture(const String& filename);
|
|
|
|
/** @overload
|
|
@brief Open video file or a capturing device or a IP video stream for video capturing with API Preference
|
|
|
|
@param filename it can be:
|
|
- name of video file (eg. `video.avi`)
|
|
- or image sequence (eg. `img_%02d.jpg`, which will read samples like `img_00.jpg, img_01.jpg, img_02.jpg, ...`)
|
|
- or URL of video stream (eg. `protocol://host:port/script_name?script_params|auth`).
|
|
Note that each video stream or IP camera feed has its own URL scheme. Please refer to the
|
|
documentation of source stream to know the right URL.
|
|
@param apiPreference preferred Capture API backends to use. Can be used to enforce a specific reader
|
|
implementation if multiple are available: e.g. cv::CAP_FFMPEG or cv::CAP_IMAGES or cv::CAP_DSHOW.
|
|
@sa The list of supported API backends cv::VideoCaptureAPIs
|
|
*/
|
|
CV_WRAP VideoCapture(const String& filename, int apiPreference);
|
|
|
|
/** @overload
|
|
@brief Open a camera for video capturing
|
|
|
|
@param index camera_id + domain_offset (CAP_*) id of the video capturing device to open. To open default camera using default backend just pass 0.
|
|
Use a `domain_offset` to enforce a specific reader implementation if multiple are available like cv::CAP_FFMPEG or cv::CAP_IMAGES or cv::CAP_DSHOW.
|
|
e.g. to open Camera 1 using the MS Media Foundation API use `index = 1 + cv::CAP_MSMF`
|
|
|
|
@sa The list of supported API backends cv::VideoCaptureAPIs
|
|
*/
|
|
CV_WRAP VideoCapture(int index);
|
|
|
|
/** @brief Default destructor
|
|
|
|
The method first calls VideoCapture::release to close the already opened file or camera.
|
|
*/
|
|
virtual ~VideoCapture();
|
|
|
|
/** @brief Open video file or a capturing device or a IP video stream for video capturing
|
|
|
|
@overload
|
|
|
|
Parameters are same as the constructor VideoCapture(const String& filename)
|
|
@return `true` if the file has been successfully opened
|
|
|
|
The method first calls VideoCapture::release to close the already opened file or camera.
|
|
*/
|
|
CV_WRAP virtual bool open(const String& filename);
|
|
|
|
/** @brief Open a camera for video capturing
|
|
|
|
@overload
|
|
|
|
Parameters are same as the constructor VideoCapture(int index)
|
|
@return `true` if the camera has been successfully opened.
|
|
|
|
The method first calls VideoCapture::release to close the already opened file or camera.
|
|
*/
|
|
CV_WRAP virtual bool open(int index);
|
|
|
|
/** @brief Open a camera for video capturing
|
|
|
|
@overload
|
|
|
|
Parameters are similar as the constructor VideoCapture(int index),except it takes an additional argument apiPreference.
|
|
Definitely, is same as open(int index) where `index=cameraNum + apiPreference`
|
|
@return `true` if the camera has been successfully opened.
|
|
*/
|
|
CV_WRAP bool open(int cameraNum, int apiPreference);
|
|
|
|
/** @brief Returns true if video capturing has been initialized already.
|
|
|
|
If the previous call to VideoCapture constructor or VideoCapture::open() succeeded, the method returns
|
|
true.
|
|
*/
|
|
CV_WRAP virtual bool isOpened() const;
|
|
|
|
/** @brief Closes video file or capturing device.
|
|
|
|
The method is automatically called by subsequent VideoCapture::open and by VideoCapture
|
|
destructor.
|
|
|
|
The C function also deallocates memory and clears \*capture pointer.
|
|
*/
|
|
CV_WRAP virtual void release();
|
|
|
|
/** @brief Grabs the next frame from video file or capturing device.
|
|
|
|
@return `true` (non-zero) in the case of success.
|
|
|
|
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.
|
|
|
|
@ref tutorial_kinect_openni
|
|
*/
|
|
CV_WRAP virtual bool grab();
|
|
|
|
/** @brief Decodes and returns the grabbed video frame.
|
|
|
|
@param [out] image the video frame is returned here. If no frames has been grabbed the image will be empty.
|
|
@param flag it could be a frame index or a driver specific flag
|
|
@return `false` if no frames has been grabbed
|
|
|
|
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()).
|
|
|
|
@sa read()
|
|
|
|
@note In @ref videoio_c "C API", functions cvRetrieveFrame() and cv.RetrieveFrame() return image stored inside the video
|
|
capturing structure. It is not allowed to modify or release the image! You can copy the frame using
|
|
:ocvcvCloneImage and then do whatever you want with the copy.
|
|
*/
|
|
CV_WRAP virtual bool retrieve(OutputArray image, int flag = 0);
|
|
|
|
/** @brief Stream operator to read the next video frame.
|
|
@sa read()
|
|
*/
|
|
virtual VideoCapture& operator >> (CV_OUT Mat& image);
|
|
|
|
/** @overload
|
|
@sa read()
|
|
*/
|
|
virtual VideoCapture& operator >> (CV_OUT UMat& image);
|
|
|
|
/** @brief Grabs, decodes and returns the next video frame.
|
|
|
|
@param [out] image the video frame is returned here. If no frames has been grabbed the image will be empty.
|
|
@return `false` if no frames has been grabbed
|
|
|
|
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()).
|
|
|
|
@note In @ref videoio_c "C API", functions cvRetrieveFrame() and cv.RetrieveFrame() return image stored inside the video
|
|
capturing structure. It is not allowed to modify or release the image! You can copy the frame using
|
|
:ocvcvCloneImage and then do whatever you want with the copy.
|
|
*/
|
|
CV_WRAP virtual bool read(OutputArray image);
|
|
|
|
/** @brief Sets a property in the VideoCapture.
|
|
|
|
@param propId Property identifier from cv::VideoCaptureProperties (eg. cv::CAP_PROP_POS_MSEC, cv::CAP_PROP_POS_FRAMES, ...)
|
|
or one from @ref videoio_flags_others
|
|
@param value Value of the property.
|
|
@return `true` if the property is supported by backend used by the VideoCapture instance.
|
|
@note Even if it returns `true` this doesn't ensure that the property
|
|
value has been accepted by the capture device. See note in VideoCapture::get()
|
|
*/
|
|
CV_WRAP virtual bool set(int propId, double value);
|
|
|
|
/** @brief Returns the specified VideoCapture property
|
|
|
|
@param propId Property identifier from cv::VideoCaptureProperties (eg. cv::CAP_PROP_POS_MSEC, cv::CAP_PROP_POS_FRAMES, ...)
|
|
or one from @ref videoio_flags_others
|
|
@return Value for the specified property. Value 0 is returned when querying a property that is
|
|
not supported by the backend used by the VideoCapture instance.
|
|
|
|
@note Reading / writing properties involves many layers. Some unexpected result might happens
|
|
along this chain.
|
|
@code {.txt}
|
|
`VideoCapture -> API Backend -> Operating System -> Device Driver -> Device Hardware`
|
|
@endcode
|
|
The returned value might be different from what really used by the device or it could be encoded
|
|
using device dependant rules (eg. steps or percentage). Effective behaviour depends from device
|
|
driver and API Backend
|
|
|
|
*/
|
|
CV_WRAP virtual double get(int propId) const;
|
|
|
|
/** @brief Open video file or a capturing device or a IP video stream for video capturing with API Preference
|
|
|
|
@overload
|
|
|
|
Parameters are same as the constructor VideoCapture(const String& filename, int apiPreference)
|
|
@return `true` if the file has been successfully opened
|
|
|
|
The method first calls VideoCapture::release to close the already opened file or camera.
|
|
*/
|
|
CV_WRAP virtual bool open(const String& filename, int apiPreference);
|
|
|
|
protected:
|
|
Ptr<CvCapture> cap;
|
|
Ptr<IVideoCapture> icap;
|
|
};
|
|
|
|
class IVideoWriter;
|
|
|
|
/** @example videowriter_basic.cpp
|
|
An example using VideoCapture and VideoWriter class
|
|
*/
|
|
/** @brief Video writer class.
|
|
|
|
The class provides C++ API for writing video files or image sequences.
|
|
*/
|
|
class CV_EXPORTS_W VideoWriter
|
|
{
|
|
public:
|
|
/** @brief Default constructors
|
|
|
|
The constructors/functions initialize video writers.
|
|
- On Linux FFMPEG is used to write videos;
|
|
- On Windows FFMPEG or VFW is used;
|
|
- On MacOSX QTKit is used.
|
|
*/
|
|
CV_WRAP VideoWriter();
|
|
|
|
/** @overload
|
|
@param filename Name of the output video file.
|
|
@param fourcc 4-character code of codec used to compress the frames. For example,
|
|
VideoWriter::fourcc('P','I','M','1') is a MPEG-1 codec, VideoWriter::fourcc('M','J','P','G') is a
|
|
motion-jpeg codec etc. List of codes can be obtained at [Video Codecs by
|
|
FOURCC](http://www.fourcc.org/codecs.php) page. FFMPEG backend with MP4 container natively uses
|
|
other values as fourcc code: see [ObjectType](http://www.mp4ra.org/codecs.html),
|
|
so you may receive a warning message from OpenCV about fourcc code conversion.
|
|
@param fps Framerate of the created video stream.
|
|
@param frameSize Size of the video frames.
|
|
@param isColor If it is not zero, the encoder will expect and encode color frames, otherwise it
|
|
will work with grayscale frames (the flag is currently supported on Windows only).
|
|
|
|
@b Tips:
|
|
- With some backends `fourcc=-1` pops up the codec selection dialog from the system.
|
|
- To save image sequence use a proper filename (eg. `img_%02d.jpg`) and `fourcc=0`
|
|
OR `fps=0`. Use uncompressed image format (eg. `img_%02d.BMP`) to save raw frames.
|
|
- Most codecs are lossy. If you want lossless video file you need to use a lossless codecs
|
|
(eg. FFMPEG FFV1, Huffman HFYU, Lagarith LAGS, etc...)
|
|
- If FFMPEG is enabled, using `codec=0; fps=0;` you can create an uncompressed (raw) video file.
|
|
*/
|
|
CV_WRAP VideoWriter(const String& filename, int fourcc, double fps,
|
|
Size frameSize, bool isColor = true);
|
|
|
|
/** @overload
|
|
The `apiPreference` parameter allows to specify API backends to use. Can be used to enforce a specific reader implementation
|
|
if multiple are available: e.g. cv::CAP_FFMPEG or cv::CAP_GSTREAMER.
|
|
*/
|
|
CV_WRAP VideoWriter(const String& filename, int apiPreference, int fourcc, double fps,
|
|
Size frameSize, bool isColor = true);
|
|
|
|
/** @brief Default destructor
|
|
|
|
The method first calls VideoWriter::release to close the already opened file.
|
|
*/
|
|
virtual ~VideoWriter();
|
|
|
|
/** @brief Initializes or reinitializes video writer.
|
|
|
|
The method opens video writer. Parameters are the same as in the constructor
|
|
VideoWriter::VideoWriter.
|
|
@return `true` if video writer has been successfully initialized
|
|
|
|
The method first calls VideoWriter::release to close the already opened file.
|
|
*/
|
|
CV_WRAP virtual bool open(const String& filename, int fourcc, double fps,
|
|
Size frameSize, bool isColor = true);
|
|
|
|
/** @overload
|
|
*/
|
|
CV_WRAP bool open(const String& filename, int apiPreference, int fourcc, double fps,
|
|
Size frameSize, bool isColor = true);
|
|
|
|
/** @brief Returns true if video writer has been successfully initialized.
|
|
*/
|
|
CV_WRAP virtual bool isOpened() const;
|
|
|
|
/** @brief Closes the video writer.
|
|
|
|
The method is automatically called by subsequent VideoWriter::open and by the VideoWriter
|
|
destructor.
|
|
*/
|
|
CV_WRAP virtual void release();
|
|
|
|
/** @brief Stream operator to write the next video frame.
|
|
@sa write
|
|
*/
|
|
virtual VideoWriter& operator << (const Mat& image);
|
|
|
|
/** @brief Writes the next video frame
|
|
|
|
@param image The written frame
|
|
|
|
The function/method writes the specified image to video file. It must have the same size as has
|
|
been specified when opening the video writer.
|
|
*/
|
|
CV_WRAP virtual void write(const Mat& image);
|
|
|
|
/** @brief Sets a property in the VideoWriter.
|
|
|
|
@param propId Property identifier from cv::VideoWriterProperties (eg. cv::VIDEOWRITER_PROP_QUALITY)
|
|
or one of @ref videoio_flags_others
|
|
|
|
@param value Value of the property.
|
|
@return `true` if the property is supported by the backend used by the VideoWriter instance.
|
|
*/
|
|
CV_WRAP virtual bool set(int propId, double value);
|
|
|
|
/** @brief Returns the specified VideoWriter property
|
|
|
|
@param propId Property identifier from cv::VideoWriterProperties (eg. cv::VIDEOWRITER_PROP_QUALITY)
|
|
or one of @ref videoio_flags_others
|
|
|
|
@return Value for the specified property. Value 0 is returned when querying a property that is
|
|
not supported by the backend used by the VideoWriter instance.
|
|
*/
|
|
CV_WRAP virtual double get(int propId) const;
|
|
|
|
/** @brief Concatenates 4 chars to a fourcc code
|
|
|
|
@return a fourcc code
|
|
|
|
This static method constructs the fourcc code of the codec to be used in the constructor
|
|
VideoWriter::VideoWriter or VideoWriter::open.
|
|
*/
|
|
CV_WRAP static int fourcc(char c1, char c2, char c3, char c4);
|
|
|
|
protected:
|
|
Ptr<CvVideoWriter> writer;
|
|
Ptr<IVideoWriter> iwriter;
|
|
|
|
static Ptr<IVideoWriter> create(const String& filename, int fourcc, double fps,
|
|
Size frameSize, bool isColor = true);
|
|
};
|
|
|
|
template<> CV_EXPORTS void DefaultDeleter<CvCapture>::operator ()(CvCapture* obj) const;
|
|
template<> CV_EXPORTS void DefaultDeleter<CvVideoWriter>::operator ()(CvVideoWriter* obj) const;
|
|
|
|
//! @} videoio
|
|
|
|
} // cv
|
|
|
|
#endif //OPENCV_VIDEOIO_HPP
|