232 lines
8.9 KiB
HTML
232 lines
8.9 KiB
HTML
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<title>Capture \ Language (API) \ Processing 2+</title>
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<meta name="Description" content="Processing is a flexible software sketchbook and a language for learning how to code within the context of the visual arts. Since 2001, Processing has promoted software literacy within the visual arts and visual literacy within technology." />
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<p class="ref-notice">This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, <a href="https://github.com/processing/processing-docs/issues?state=open">please let us know</a>. If you prefer a more technical reference, visit the <a href="http://processing.github.io/processing-javadocs/core/">Processing Core Javadoc</a> and <a href="http://processing.github.io/processing-javadocs/libraries/">Libraries Javadoc</a>.</p>
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<table cellpadding="0" cellspacing="0" border="0" class="ref-item">
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<tr class="name-row">
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<th scope="row">Name</th>
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<td><h3>Capture</h3></td>
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</tr>
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<tr class=""><th scope="row">Examples</th><td><div class="example"><pre >
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import processing.video.*;
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Capture cam;
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void setup() {
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size(640, 480);
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String[] cameras = Capture.list();
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if (cameras.length == 0) {
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println("There are no cameras available for capture.");
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exit();
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} else {
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println("Available cameras:");
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for (int i = 0; i < cameras.length; i++) {
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println(cameras[i]);
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}
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// The camera can be initialized directly using an
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// element from the array returned by list():
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cam = new Capture(this, cameras[0]);
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cam.start();
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}
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}
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void draw() {
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if (cam.available() == true) {
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cam.read();
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}
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image(cam, 0, 0);
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// The following does the same, and is faster when just drawing the image
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// without any additional resizing, transformations, or tint.
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//set(0, 0, cam);
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}
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</pre></div>
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</td></tr>
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<tr class="">
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<th scope="row">Description</th>
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<td>
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Datatype for storing and manipulating video frames from an attached capture device such as a camera. Use <b>Capture.list()</b> to show the names of any attached devices. Using the version of the constructor without <b>name</b> will attempt to use the last device used by a QuickTime program.
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</td>
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</tr>
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<tr class=""><th scope="row">Methods</th><td><table cellpadding="0" cellspacing="0" border="0"><tr class="">
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<th scope="row"><a href="Capture_available_.html">available()</a></th>
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<td>Returns "true" when a new video frame is available to read</td>
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</tr>
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<tr class="">
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<th scope="row"><a href="Capture_start_.html">start()</a></th>
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<td>Starts capturing frames from the selected device</td>
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</tr>
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<tr class="">
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<th scope="row"><a href="Capture_stop_.html">stop()</a></th>
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<td>Stops capturing frames from an attached device</td>
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</tr>
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<tr class="">
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<th scope="row"><a href="Capture_read_.html">read()</a></th>
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<td>Reads the current video frame</td>
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</tr>
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<tr class="">
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<th scope="row"><a href="Capture_list_.html">list()</a></th>
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<td>Gets a list of all available capture devices such as a camera</td>
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</tr></table></td></tr>
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<tr class=""><th scope="row">Constructor</th><td><pre>Capture(<kbd>parent</kbd>)
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Capture(<kbd>parent</kbd>, <kbd>requestConfig</kbd>)
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Capture(<kbd>parent</kbd>, <kbd>requestWidth</kbd>, <kbd>requestHeight</kbd>)
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Capture(<kbd>parent</kbd>, <kbd>requestWidth</kbd>, <kbd>requestHeight</kbd>, <kbd>frameRate</kbd>)
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Capture(<kbd>parent</kbd>, <kbd>requestWidth</kbd>, <kbd>requestHeight</kbd>, <kbd>cameraName</kbd>)
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Capture(<kbd>parent</kbd>, <kbd>requestWidth</kbd>, <kbd>requestHeight</kbd>, <kbd>cameraName</kbd>, <kbd>frameRate</kbd>)
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</pre></td></tr>
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<tr class=""> <th scope="row">Parameters</th><td><table cellpadding="0" cellspacing="0" border="0"><tr class="">
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<th scope="row" class="code">parent</th>
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<td>PApplet: typically use "this"</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">requestWidth</th>
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<td>int: width of the frame</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">requestHeight</th>
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<td>int: height of the frame</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">frameRate</th>
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<td>int: number of frames to read per second</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">cameraName</th>
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<td>String: name of the camera</td>
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</tr></table></td> </tr>
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</table>
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Updated on April 30, 2017 02:33:21pm EDT<br /><br />
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