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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>
<!-- END META TAG INFO -->
<!-- BEGIN TITLE -->
<title>QTCompressionOptionsWindow</title>
<!-- END TITLE -->
<script language="JavaScript">
function JumpToNewPage() {
window.location=document.scpopupmenu.gotop.value;
return true;
}
</script>
</head>
<!-- BEGIN BODY OPEN -->
<body><a name="//apple_ref/doc/uid/DTS10004627" title="QTCompressionOptionsWindow"></a>
<!--END BODY OPEN -->
<!-- START CENTER OPEN -->
<center>
<!-- END CENTER OPEN -->
<!-- BEGIN LOGO AND SEARCH -->
<!--#include virtual="/includes/adcnavbar"-->
<!-- END LOGO AND SEARCH -->
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<tr>
<td scope="row"><img width="340" height="10" src="images/1dot.gif" alt=""></td>
<td><img width="340" height="10" src="images/1dot.gif" alt=""></td>
</tr>
<tr valign="middle">
<td align="left" colspan="2">
<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> >
</td>
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<!-- START MAIN CONTENT -->
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<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td><h1><div id="pagehead">QTCompressionOptionsWindow</div></h1></td>
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<td id="scdetails">
<p><strong>Version:</strong> 1.0</p>
<p><strong>Posted:</strong> 2008-02-22</p>
<p><strong>Build Requirements:</strong> Mac OS X 10.5, QuickTime 7.4+</p>
<p><strong>Runtime Requirements:</strong> Mac OS X 10.5. QuickTime 7.4+</p>
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<p><strong>View Source Code:</strong>
<select name="gotop" onChange="JumpToNewPage();" style="width:340px"><option selected value="ingnore">Select File</option>
<option value="listing1.html">/main.m</option>
<option value="listing2.html">/MyController.h</option>
<option value="listing3.html">/MyController.m</option>
<option value="listing4.html">/QTCompressionOptionsWindow.h</option>
<option value="listing5.html">/QTCompressionOptionsWindow.m</option></select>
</p>
</form>
<p><strong><a href="QTCompressionOptionsWindow.zip">Download Sample</a></strong> (“QTCompressionOptionsWindow.zip”, 275.6K)<BR>
<strong><a href="QTCompressionOptionsWindow.dmg">Download Sample</a></strong> (“QTCompressionOptionsWindow.dmg”, 342.2K)</p>
</td>
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<tr>
<td scope="row"><img width="680" height="10" src="images/1dot.gif" alt=""><br>
<img height="1" width="680" src="images/1dot_919699.gif" alt=""><br>
<img width="680" height="20" src="images/1dot.gif" alt=""></td>
</tr>
<tr>
<td scope="row">
<h2>Description</h2>
<p>The QTCompressionOptionsWindow sample is based on QTKit Capture classes and acts as a test bed for the included QTCompressionOptionsWindow class. A Video Capture Device is required to run this sample.</p><p>QTCompressionOptionsWindow is a simple class that demonstrates one way to manage a user interface containing media compression options encapsulated in QTCompressionOptions objects. This re-usable class in completely self contained and has three parts; The nib file called QTCompressionOptionsWindow.nib, the Class Header called QTCompressionOptionsWindow.h and the implementation file called QTCompressionOptionsWindow.m. All three files must be included in any project using this object.</p><p>You can create a QTCompressionOptionsWindow instance by calling initWithMediaType: or by instantiating an instance in your Main.nib file and setting the delegate accordingly.</p><p>QTKit uses the QTCompressionOptions objects as a way to reference a set of compression settings for a particular type of media. QTCompressionOptions objects are used to describe compression settings for different types of media and are created from preset keys such as @"QTCompressionOptions120SizeH264Video" or @"QTCompressionOptionsHighQualityAACAudio". A set of currently supported keys may be returned dynamically using the compressionOptionsIdentifiersForMediaType method.</p>
<h2>Document Revision History</h2>
<table cellspacing="0" class="graybox" width="680">
<tr>
<th width="100">Date</th>
<th width="580">Notes</th>
</tr>
<tr><td scope="row">2008-02-22</td><td>Demonstrates how easy it is to manage QTCompressionOptions instances with a user interface.</td></tr>
</table>
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<th>Did this document help you?</th>
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<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=1&url=/samplecode/QTCompressionOptionsWindow/index.html%3Fid%3DDTS10004627-1.0&media=dvd" target=_new>Yes</a>: Tell us what works for you.</div>
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<div><a href="http://developer.apple.com/feedback/?v=3&url=/samplecode/QTCompressionOptionsWindow/index.html%3Fid%3DDTS10004627-1.0&media=dvd" target=_new>It wasn’t helpful</a>: Tell us what would have helped.</div>
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