vision.VideoPlayer

Play video or display image

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Description

Play a video or display image sequences.

Note

If you own the MATLAB® Coder™ product, you can generate C or C++ code from MATLAB code in which an instance of this system object is created. When you do so, the scope system object is automatically declared as an extrinsic variable. In this manner, you are able to see the scope display in the same way that you would see a figure using the plot function, without directly generating code from it. For the full list of system objects supporting code generation, see Code Generation Support, Usage Notes, and Limitations.

Note

Starting in R2016b, instead of using the step method to perform the operation defined by the System object™, you can call the object with arguments, as if it were a function. For example, y = step(obj,x) and y = obj(x) perform equivalent operations.

Creation

Syntax

videoPlayer = vision.VideoPlayer
videoPlayer = vision.VideoPlayer(___,Name,Value)

Description

example

videoPlayer = vision.VideoPlayer returns a video player object, videoPlayer, for displaying video frames.

videoPlayer = vision.VideoPlayer(___,Name,Value)additionally sets properties using one or more name-value pairs. Enclose each property name in quotes. For example, videoPlayer = vision.VideoPlayer('Name','Caption title')

Properties

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Caption display on video player window, specified as a character vector.

Tunable: Yes

Size and position of the video player window in pixels, specified as a four-element vector, [left bottom width height]. The default size depends on your screen resolution. The window is positioned in the center of the screen, 400 pixels in width by 300 pixels in height.

Tunable: Yes

Usage

Syntax

videoPlayer(videoFrame)

Description

videoPlayer(videoFrame) displays one grayscale or truecolor RGB video frame,videoFrame, in the video player.

Input Arguments

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Video frame, specified as a truecolor or 2-D grayscale image.

Object Functions

To use an object function, specify the System object as the first input argument. For example, to release system resources of a System object named obj, use this syntax:

release(obj)

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stepRun System object algorithm
releaseRelease resources and allow changes to System object property values and input characteristics
resetReset internal states of System object

Examples

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Open Script

Read video from a file and set up player object.

videoReader = VideoReader('viplanedeparture.mp4');
videoPlayer = vision.VideoPlayer;

Play video. Every call to the step method reads another frame.

while hasFrame(videoReader)
   frame = readFrame(videoReader);
   step(videoPlayer,frame);
end

Close the video player.

release(videoPlayer);

See Also

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Topics

Introduced in R2012a

Computer Vision Toolbox Documentation

Support