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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
<!-- BEGIN META TAG INFO -->
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="home" href="http://developer.apple.com/">
<link rel="find" href="http://developer.apple.com/search/">
<link rel="stylesheet" type="text/css" href="../../documentation/css/adcstyle.css" title="fonts">
<script language="JavaScript" src="../../documentation/js/adc.js" type="text/javascript"></script>
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<!-- BEGIN TITLE -->
<title>QTKitMovieFrameImage</title>
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return true;
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<body><a name="//apple_ref/doc/uid/DTS10004452" title="QTKitMovieFrameImage"></a>
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<center>
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<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/QuickTime/index.html">QuickTime</a> > <a href="../../samplecode/QuickTime/idxCocoa-date.html">Cocoa</a> >
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<td><h1><div id="pagehead">QTKitMovieFrameImage</div></h1></td>
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<p><strong>Version:</strong> 1.0</p>
<p><strong>Posted:</strong> 2007-08-31</p>
<p><strong>Build Requirements:</strong> Xcode 3.0</p>
<p><strong>Runtime Requirements:</strong> Mac OS X Leopard, QuickTime 7.2.1 or better</p>
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<p><strong><a href="QTKitMovieFrameImage.zip">Download Sample</a></strong> (“QTKitMovieFrameImage.zip”, 256.6K)<BR>
<strong><a href="QTKitMovieFrameImage.dmg">Download Sample</a></strong> (“QTKitMovieFrameImage.dmg”, 316.7K)</p>
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<img height="1" width="680" src="images/1dot_919699.gif" alt=""><br>
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<h2>Description</h2>
<p>This sample shows how to use the QTMovie frameImageAtTime: method to get an NSImage for the frame at a given time in a QTMovie.</p><p>Mac OS X Leopard contains a new version of this method that gives the ability to pass a dictionary of attributes describing exactly the kind of image you want:</p><p>- (NSImage *)frameImageAtTime:(QTTime)time withAttributes:(NSDictionary *)attributes error: (NSError **)errorPtr;</p><p>Previously, you always got back an NSImage of the current movie size from this method, even if this was not what was desired. This required a lot of post-processing of the returned image.</p><p>Now, you can specify the following attributes when calling this method:</p><p>QTMovieFrameImageSize</p><p>QTMovieFrameImageType</p><p>QTMovieFrameImageRepresentationsType</p><p>QTMovieFrameImageOpenGLContext</p><p>QTMovieFrameImagePixelFormat</p><p>QTMovieFrameImageInterlaced</p><p>QTMovieFrameImageHighQuality</p><p>QTMovieFrameImageSingleField</p><p>(See QTMovie.h for more details)</p><p>These give the developer much more control over the type of image that is returned.</p>
<h2>Document Revision History</h2>
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<th width="100">Date</th>
<th width="580">Notes</th>
</tr>
<tr><td scope="row">2007-08-31</td><td>Using the QTMovie frameImageAtTime: withAttributes: method to get an image for the frame at a given time in a QTMovie.</td></tr>
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