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Objective-C

Merge Audio with AVFoundation Framework

NSArray *dirPaths;
NSString *docsDir;

dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];

// Path of Record Audio
NSString *soundFilePath = [docsDir stringByAppendingPathComponent:@"sound.caf"];
NSURL *soundFileUrl = [NSURL fileURLWithPath:soundFilePath];

// Asset for Record Audio
AVURLAsset *recordAsset = [AVURLAsset URLAssetWithURL:soundFileUrl options:nil];

// Asset for Mix Audio
AVURLAsset *mixAsset = [AVURLAsset URLAssetWithURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"mix-audio" ofType:@"m4a"]] options:nil];

// Mix
AVMutableComposition *mixComposition = [[AVMutableComposition alloc] init];
AVMutableCompositionTrack *recordTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
[recordTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, recordAsset.duration) ofTrack:[[recordAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:kCMTimeZero error:nil];
AVMutableCompositionTrack *mixTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
[mixTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, recordAsset.duration) ofTrack:[[mixAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:kCMTimeZero error:nil];

NSString *outputPath =  [docsDir stringByAppendingPathComponent:@"final-output.m4a"];

// Export
AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetAppleM4A];
exporter.outputURL = [NSURL fileURLWithPath:outputPath];
exporter.outputFileType = AVFileTypeAppleM4A;

[exporter exportAsynchronouslyWithCompletionHandler:^{
    // Export Finished
}];

// Exporting Progress
[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(updateMixingProgress:) userInfo:exporter repeats:YES];

[mixComposition release];
[exporter release];
https://snipt.net/embed/63ea72c7222c38806411609db288df34/
/raw/63ea72c7222c38806411609db288df34/
63ea72c7222c38806411609db288df34
objective-c
Objective-C
39
2019-07-17T08:24:40
True
False
False
Sep 29, 2012 at 08:52 AM
/api/public/snipt/47813/
merge-audio-with-avfoundation-framework
<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><a href="#L-1"> 1</a> <a href="#L-2"> 2</a> <a href="#L-3"> 3</a> <a href="#L-4"> 4</a> <a href="#L-5"> 5</a> <a href="#L-6"> 6</a> <a href="#L-7"> 7</a> <a href="#L-8"> 8</a> <a href="#L-9"> 9</a> <a href="#L-10">10</a> <a href="#L-11">11</a> <a href="#L-12">12</a> <a href="#L-13">13</a> <a href="#L-14">14</a> <a href="#L-15">15</a> <a href="#L-16">16</a> <a href="#L-17">17</a> <a href="#L-18">18</a> <a href="#L-19">19</a> <a href="#L-20">20</a> <a href="#L-21">21</a> <a href="#L-22">22</a> <a href="#L-23">23</a> <a href="#L-24">24</a> <a href="#L-25">25</a> <a href="#L-26">26</a> <a href="#L-27">27</a> <a href="#L-28">28</a> <a href="#L-29">29</a> <a href="#L-30">30</a> <a href="#L-31">31</a> <a href="#L-32">32</a> <a href="#L-33">33</a> <a href="#L-34">34</a> <a href="#L-35">35</a> <a href="#L-36">36</a> <a href="#L-37">37</a> <a href="#L-38">38</a> <a href="#L-39">39</a></pre></div></td><td class="code"><div class="highlight"><pre><span></span><span id="L-1"><a name="L-1"></a><span class="bp">NSArray</span> <span class="o">*</span><span class="n">dirPaths</span><span class="p">;</span> </span><span id="L-2"><a name="L-2"></a><span class="bp">NSString</span> <span class="o">*</span><span class="n">docsDir</span><span class="p">;</span> </span><span id="L-3"><a name="L-3"></a> </span><span id="L-4"><a name="L-4"></a><span class="n">dirPaths</span> <span class="o">=</span> <span class="n">NSSearchPathForDirectoriesInDomains</span><span class="p">(</span><span class="n">NSDocumentDirectory</span><span class="p">,</span> <span class="n">NSUserDomainMask</span><span class="p">,</span> <span class="nb">YES</span><span class="p">);</span> </span><span id="L-5"><a name="L-5"></a><span class="n">docsDir</span> <span class="o">=</span> <span class="p">[</span><span class="n">dirPaths</span> <span class="nl">objectAtIndex</span><span class="p">:</span><span class="mi">0</span><span class="p">];</span> </span><span id="L-6"><a name="L-6"></a> </span><span id="L-7"><a name="L-7"></a><span class="c1">// Path of Record Audio</span> </span><span id="L-8"><a name="L-8"></a><span class="bp">NSString</span> <span class="o">*</span><span class="n">soundFilePath</span> <span class="o">=</span> <span class="p">[</span><span class="n">docsDir</span> <span class="nl">stringByAppendingPathComponent</span><span class="p">:</span><span class="s">@&quot;sound.caf&quot;</span><span class="p">];</span> </span><span id="L-9"><a name="L-9"></a><span class="bp">NSURL</span> <span class="o">*</span><span class="n">soundFileUrl</span> <span class="o">=</span> <span class="p">[</span><span class="bp">NSURL</span> <span class="nl">fileURLWithPath</span><span class="p">:</span><span class="n">soundFilePath</span><span class="p">];</span> </span><span id="L-10"><a name="L-10"></a> </span><span id="L-11"><a name="L-11"></a><span class="c1">// Asset for Record Audio</span> </span><span id="L-12"><a name="L-12"></a><span class="bp">AVURLAsset</span> <span class="o">*</span><span class="n">recordAsset</span> <span class="o">=</span> <span class="p">[</span><span class="bp">AVURLAsset</span> <span class="nl">URLAssetWithURL</span><span class="p">:</span><span class="n">soundFileUrl</span> <span class="nl">options</span><span class="p">:</span><span class="nb">nil</span><span class="p">];</span> </span><span id="L-13"><a name="L-13"></a> </span><span id="L-14"><a name="L-14"></a><span class="c1">// Asset for Mix Audio</span> </span><span id="L-15"><a name="L-15"></a><span class="bp">AVURLAsset</span> <span class="o">*</span><span class="n">mixAsset</span> <span class="o">=</span> <span class="p">[</span><span class="bp">AVURLAsset</span> <span class="nl">URLAssetWithURL</span><span class="p">:[</span><span class="bp">NSURL</span> <span class="nl">fileURLWithPath</span><span class="p">:[[</span><span class="bp">NSBundle</span> <span class="n">mainBundle</span><span class="p">]</span> <span class="nl">pathForResource</span><span class="p">:</span><span class="s">@&quot;mix-audio&quot;</span> <span class="nl">ofType</span><span class="p">:</span><span class="s">@&quot;m4a&quot;</span><span class="p">]]</span> <span class="nl">options</span><span class="p">:</span><span class="nb">nil</span><span class="p">];</span> </span><span id="L-16"><a name="L-16"></a> </span><span id="L-17"><a name="L-17"></a><span class="c1">// Mix</span> </span><span id="L-18"><a name="L-18"></a><span class="bp">AVMutableComposition</span> <span class="o">*</span><span class="n">mixComposition</span> <span class="o">=</span> <span class="p">[[</span><span class="bp">AVMutableComposition</span> <span class="n">alloc</span><span class="p">]</span> <span class="n">init</span><span class="p">];</span> </span><span id="L-19"><a name="L-19"></a><span class="bp">AVMutableCompositionTrack</span> <span class="o">*</span><span class="n">recordTrack</span> <span class="o">=</span> <span class="p">[</span><span class="n">mixComposition</span> <span class="nl">addMutableTrackWithMediaType</span><span class="p">:</span><span class="n">AVMediaTypeAudio</span> <span class="nl">preferredTrackID</span><span class="p">:</span><span class="n">kCMPersistentTrackID_Invalid</span><span class="p">];</span> </span><span id="L-20"><a name="L-20"></a><span class="p">[</span><span class="n">recordTrack</span> <span class="nl">insertTimeRange</span><span class="p">:</span><span class="n">CMTimeRangeMake</span><span class="p">(</span><span class="n">kCMTimeZero</span><span class="p">,</span> <span class="n">recordAsset</span><span class="p">.</span><span class="n">duration</span><span class="p">)</span> <span class="nl">ofTrack</span><span class="p">:[[</span><span class="n">recordAsset</span> <span class="nl">tracksWithMediaType</span><span class="p">:</span><span class="n">AVMediaTypeAudio</span><span class="p">]</span> <span class="nl">objectAtIndex</span><span class="p">:</span><span class="mi">0</span><span class="p">]</span> <span class="nl">atTime</span><span class="p">:</span><span class="n">kCMTimeZero</span> <span class="nl">error</span><span class="p">:</span><span class="nb">nil</span><span class="p">];</span> </span><span id="L-21"><a name="L-21"></a><span class="bp">AVMutableCompositionTrack</span> <span class="o">*</span><span class="n">mixTrack</span> <span class="o">=</span> <span class="p">[</span><span class="n">mixComposition</span> <span class="nl">addMutableTrackWithMediaType</span><span class="p">:</span><span class="n">AVMediaTypeAudio</span> <span class="nl">preferredTrackID</span><span class="p">:</span><span class="n">kCMPersistentTrackID_Invalid</span><span class="p">];</span> </span><span id="L-22"><a name="L-22"></a><span class="p">[</span><span class="n">mixTrack</span> <span class="nl">insertTimeRange</span><span class="p">:</span><span class="n">CMTimeRangeMake</span><span class="p">(</span><span class="n">kCMTimeZero</span><span class="p">,</span> <span class="n">recordAsset</span><span class="p">.</span><span class="n">duration</span><span class="p">)</span> <span class="nl">ofTrack</span><span class="p">:[[</span><span class="n">mixAsset</span> <span class="nl">tracksWithMediaType</span><span class="p">:</span><span class="n">AVMediaTypeAudio</span><span class="p">]</span> <span class="nl">objectAtIndex</span><span class="p">:</span><span class="mi">0</span><span class="p">]</span> <span class="nl">atTime</span><span class="p">:</span><span class="n">kCMTimeZero</span> <span class="nl">error</span><span class="p">:</span><span class="nb">nil</span><span class="p">];</span> </span><span id="L-23"><a name="L-23"></a> </span><span id="L-24"><a name="L-24"></a><span class="bp">NSString</span> <span class="o">*</span><span class="n">outputPath</span> <span class="o">=</span> <span class="p">[</span><span class="n">docsDir</span> <span class="nl">stringByAppendingPathComponent</span><span class="p">:</span><span class="s">@&quot;final-output.m4a&quot;</span><span class="p">];</span> </span><span id="L-25"><a name="L-25"></a> </span><span id="L-26"><a name="L-26"></a><span class="c1">// Export</span> </span><span id="L-27"><a name="L-27"></a><span class="bp">AVAssetExportSession</span> <span class="o">*</span><span class="n">exporter</span> <span class="o">=</span> <span class="p">[[</span><span class="bp">AVAssetExportSession</span> <span class="n">alloc</span><span class="p">]</span> <span class="nl">initWithAsset</span><span class="p">:</span><span class="n">mixComposition</span> <span class="nl">presetName</span><span class="p">:</span><span class="n">AVAssetExportPresetAppleM4A</span><span class="p">];</span> </span><span id="L-28"><a name="L-28"></a><span class="n">exporter</span><span class="p">.</span><span class="n">outputURL</span> <span class="o">=</span> <span class="p">[</span><span class="bp">NSURL</span> <span class="nl">fileURLWithPath</span><span class="p">:</span><span class="n">outputPath</span><span class="p">];</span> </span><span id="L-29"><a name="L-29"></a><span class="n">exporter</span><span class="p">.</span><span class="n">outputFileType</span> <span class="o">=</span> <span class="n">AVFileTypeAppleM4A</span><span class="p">;</span> </span><span id="L-30"><a name="L-30"></a> </span><span id="L-31"><a name="L-31"></a><span class="p">[</span><span class="n">exporter</span> <span class="nl">exportAsynchronouslyWithCompletionHandler</span><span class="p">:</span><span class="o">^</span><span class="p">{</span> </span><span id="L-32"><a name="L-32"></a> <span class="c1">// Export Finished</span> </span><span id="L-33"><a name="L-33"></a><span class="p">}];</span> </span><span id="L-34"><a name="L-34"></a> </span><span id="L-35"><a name="L-35"></a><span class="c1">// Exporting Progress</span> </span><span id="L-36"><a name="L-36"></a><span class="p">[</span><span class="bp">NSTimer</span> <span class="nl">scheduledTimerWithTimeInterval</span><span class="p">:</span><span class="mf">0.1</span> <span class="nl">target</span><span class="p">:</span><span class="nb">self</span> <span class="nl">selector</span><span class="p">:</span><span class="k">@selector</span><span class="p">(</span><span class="nl">updateMixingProgress</span><span class="p">:)</span> <span class="nl">userInfo</span><span class="p">:</span><span class="n">exporter</span> <span class="nl">repeats</span><span class="p">:</span><span class="nb">YES</span><span class="p">];</span> </span><span id="L-37"><a name="L-37"></a> </span><span id="L-38"><a name="L-38"></a><span class="p">[</span><span class="n">mixComposition</span> <span class="k">release</span><span class="p">];</span> </span><span id="L-39"><a name="L-39"></a><span class="p">[</span><span class="n">exporter</span> <span class="k">release</span><span class="p">];</span> </span></pre></div> </td></tr></table>
avfoundation, ios, objective-c