An S4 Class Containing an OpenCV Video

A Video object contains an OpenCV video that originates from a video file.

Function for creating Video objects from video files.

Usage

video(filename, api = "ANY")

filename: An character string corresponding to the path to a video file.
api: A character string corresponding to the API to use for reading the video from the file (see Note; default: "ANY").

A Video object.

dim,ncol,nrow: Functions returning the dimensions of the object.
nframes: Function returning the number of frames in the object.
codec: Function returning the codec of the object.
fps: Function returning the frame rate of the object.
frame: Function returning the index of the frame to be read next.
get,set: Functions to access and set internal properties of the object.
isOpened: Function to check the status of the video stream.
readNext,readFrame: Functions to access the next or an arbitrary frame in the stream.
release: Function to release the object from memory.

Hereafter is a list of all supported APIs. Note that not all APIs will be available on your computer (actually most of them will not be).

"ANY":: automatically select an API.
"VFW":: Video For Windows.
"V4L", "V4L2":: Video For Linux.
"FIREWIRE", "FIREWARE", "IEEE1394", "DC1394", "CMU1394":: IEEE 1394 drivers.
"QT":: Quicktime.
"UNICAP":: Unicap drivers.
"DSHOW":: DirectShow.
"PVAPI":: PvAPI, Prosilica GigE SDK.
"OPENNI":: OpenNI (for Kinect).
"OPENNI_ASUS":: OpenNI (for Asus Xtion).
"XIAPI":: XIMEA Camera API.
"AVFOUNDATION":: AVFoundation framework for iOS and OSX > Lion.
"GIGANETIX":: Smartek Giganetix GigEVisionSDK.
"MSMF":: Microsoft Media Foundation.
"WINRT":: Microsoft Windows Runtime using Media Foundation.
"INTELPERC":: Intel Perceptual Computing SDK.
"OPENNI2":: OpenNI2 (for Kinect).
"OPENNI2_ASUS":: OpenNI2 (for Asus Xtion and Occipital Structure sensors).
"GPHOTO2":: gPhoto2 connection.
"GSTREAMER":: GStreamer.
"FFMPEG":: FFMPEG library.
"IMAGES":: OpenCV Image Sequence.
"ARAVIS":: Aravis SDK.
"OPENCV_MJPEG":: Built-in OpenCV MotionJPEG codec.
"INTEL_MFX":: Intel MediaSDK.

balloon <- video(system.file("sample_vid/Balloon.mp4", package = "Rvision"))
#> Error: Could not open the video.