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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>SimpleAudioExtraction</title>
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<body><a name="//apple_ref/doc/uid/DTS10003740" title="SimpleAudioExtraction"></a>
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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/idxMusicAudio-date.html">Audio</a> >
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<td><h1><div id="pagehead">SimpleAudioExtraction</div></h1></td>
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<p><strong>Version:</strong> 1.1</p>
<p><strong>Posted:</strong> 2006-01-03</p>
<p><strong>Build Requirements:</strong> Mac OS X 10.4, or Mac OS X 10.3.9 and QuickTime 7.0, Xcode 2.2</p>
<p><strong>Runtime Requirements:</strong> Mac OS X 10.4, or Mac OS X 10.3.9 and QuickTime 7.0</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">/CoreAudioUtils.c</option>
<option value="listing2.html">/CoreAudioUtils.h</option>
<option value="listing3.html">/ExtractAndPlay.c</option>
<option value="listing4.html">/ExtractAndPlay.h</option>
<option value="listing5.html">/main.c</option>
<option value="listing6.html">/MovieAudioExtractionUtils.c</option>
<option value="listing7.html">/MovieAudioExtractionUtils.h</option>
<option value="listing8.html">/QuickTimeUtils.c</option>
<option value="listing9.html">/QuickTimeUtils.h</option></select>
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<p><strong><a href="SimpleAudioExtraction.zip">Download Sample</a></strong> (“SimpleAudioExtraction.zip”, 90.5K)<BR>
<strong><a href="SimpleAudioExtraction.dmg">Download Sample</a></strong> (“SimpleAudioExtraction.dmg”, 145.2K)</p>
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<h2>Description</h2>
<p>Demonstrates how to use the QuickTime 7.0 Audio Extraction APIs: MovieAudioExtractionBegin, MovieAudioExtractionEnd and MovieAudioExtractionFillBuffer and others to extract and mix audio from a QuickTime movie. The extracted movie audio is then scheduled for playback using the AUScheduledSoundPlayer and finally rendered using a Core Audio AUGraph where an audio effect is applied.</p><p>(NOTE: The Movie Audio Extraction APIs in QuickTime 7 are now considered the preferred APIs to use for extracting audio from a Movie sound track. Previous techniques involved using the GetMediaSample API to get media sample data from the sound track, as demonstrated by the "SoundPlayer" sample code (and others) on the ADC website. While these techniques still work, they are no longer the preferred method. Use the Movie Audio Extraction APIs instead.)</p>
<h2>Document Revision History</h2>
<table cellspacing="0" class="graybox" width="680">
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<th width="100">Date</th>
<th width="580">Notes</th>
</tr>
<tr><td scope="row">2006-01-03</td><td>Updated to use AUScheduledSoundPlayer</td></tr>
<tr><td scope="row">2005-07-15</td><td>Demonstrates the QuickTime 7.0 Movie Audio Extraction APIs</td></tr>
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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/SimpleAudioExtraction/index.html%3Fid%3DDTS10003740-1.0&media=dvd" target=_new>Yes</a>: Tell us what works for you.</div>
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