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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>
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<title>QTAudioExtractionPanel</title>
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<body><a name="//apple_ref/doc/uid/DTS10003728" title="QTAudioExtractionPanel"></a>
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<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/idxMusicAudio-date.html">Audio</a> >
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<table width="680" border="0" cellpadding="0" cellspacing="0">
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<td><h1><div id="pagehead">QTAudioExtractionPanel</div></h1></td>
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<p><strong>Version:</strong> 1.0</p>
<p><strong>Posted:</strong> 2005-06-27</p>
<p><strong>Build Requirements:</strong> QuickTime 7.0 or higher, OSX 10.3.9 or 10.4</p>
<p><strong>Runtime Requirements:</strong> QuickTime 7.0 or higher (QT 7.0.1 or higher recommended)</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">/AudioPropInfo.h</option>
<option value="listing2.html">/AudioPropInfo.m</option>
<option value="listing3.html">/CoreAudioPlayback.c</option>
<option value="listing4.html">/CoreAudioPlayback.h</option>
<option value="listing5.html">/CoreAudioUtils.c</option>
<option value="listing6.html">/CoreAudioUtils.h</option>
<option value="listing7.html">/InfoForCallback.h</option>
<option value="listing8.html">/InfoForCallback.m</option>
<option value="listing9.html">/InfoObject.h</option>
<option value="listing10.html">/InfoObject.m</option>
<option value="listing11.html">/main.m</option>
<option value="listing12.html">/MovieDocument.h</option>
<option value="listing13.html">/MovieDocument.m</option>
<option value="listing14.html">/OpenURLPanel.h</option>
<option value="listing15.html">/OpenURLPanel.m</option>
<option value="listing16.html">/PopUpTableColumn.h</option>
<option value="listing17.html">/PopUpTableColumn.m</option>
<option value="listing18.html">/QTKitPlayerAppDelegate.h</option>
<option value="listing19.html">/QTKitPlayerAppDelegate.m</option>
<option value="listing20.html">/QTKitPlayerWindowController.h</option>
<option value="listing21.html">/QTKitPlayerWindowController.m</option>
<option value="listing22.html">/QuickTimeAudioUtils.c</option>
<option value="listing23.html">/QuickTimeAudioUtils.h</option>
<option value="listing24.html">/ViewTestsController.h</option>
<option value="listing25.html">/ViewTestsController.m</option></select>
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<p><strong><a href="QTAudioExtractionPanel.zip">Download Sample</a></strong> (“QTAudioExtractionPanel.zip”, 299.8K)<BR>
<strong><a href="QTAudioExtractionPanel.dmg">Download Sample</a></strong> (“QTAudioExtractionPanel.dmg”, 358.5K)</p>
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<td scope="row">
<h2>Description</h2>
<p>QTAudioExtractionPanel adds a specialized Audio Extraction panel to the QTKitPlayer sample application. This panel provides access to some of the advanced audio capabilities introduced in QuickTime 7, including:</p><p>* multi-channel audio tracks</p><p>* spatially-labeled audio channels</p><p>* movie audio mixing using spatial characteristics</p><p>* audio device channel layout display (and editing, through Audio/MIDI Setup)</p><p>* movie and track level property listeners and accessors</p><p>* movie audio extraction configuration, preview, and export</p><p>* multi-threaded audio preview and export</p><p>This sample application was developed to accompany WWDC 2005 Session 201 "Harnessing the Audio Capabilities of QuickTime 7"</p><p>The Audio Extraction panel is useful for gaining an understanding of how the movie mixer operates on spatially labeled data, but the chief purpose of this code is to demonstrate good practices in using the new QuickTime Audio APIs.</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">2005-06-27</td><td>Enhances the QTKitPlayer to add an Audio Channel Mapping and Extraction panel</td></tr>
</table>
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<th>Did this document help you?</th>
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