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POHow to reduce audio file size in IOS
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  1. POHow to reduce audio file size in IOS
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    copied!<p>I am doing an application which get songs from mediapicker and saving it to my application.i want to reduce the size of file,but i got a sample named "AACConverter",i test the application but it is not reducing the file size.could any one help me in solving this problem.</p> <pre><code>- (IBAction)convert:(id)sender { if ( ![TPAACAudioConverter AACConverterAvailable] ) { [[[[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Converting audio", @"") message:NSLocalizedString(@"Couldn't convert audio: Not supported on this device", @"") delegate:nil cancelButtonTitle:nil otherButtonTitles:NSLocalizedString(@"OK", @""), nil] autorelease] show]; return; } // Initialise audio session, and register an interruption listener, important for AAC conversion if ( !checkResult(AudioSessionInitialize(NULL, NULL, interruptionListener, self), "initialise audio session") ) { [[[[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Converting audio", @"") message:NSLocalizedString(@"Couldn't initialise audio session!", @"") delegate:nil cancelButtonTitle:nil otherButtonTitles:NSLocalizedString(@"OK", @""), nil] autorelease] show]; return; } // Set up an audio session compatible with AAC conversion. Note that AAC conversion is incompatible with any session that provides mixing with other device audio. UInt32 audioCategory = kAudioSessionCategory_MediaPlayback; if ( !checkResult(AudioSessionSetProperty(kAudioSessionProperty_AudioCategory, sizeof(audioCategory), &amp;audioCategory), "setup session category") ) { [[[[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Converting audio", @"") message:NSLocalizedString(@"Couldn't setup audio category!", @"") delegate:nil cancelButtonTitle:nil otherButtonTitles:NSLocalizedString(@"OK", @""), nil] autorelease] show]; return; } NSArray *documentsFolders = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); audioConverter = [[[TPAACAudioConverter alloc] initWithDelegate:self source:[[NSBundle mainBundle] pathForResource:@"audio" ofType:@"mp3"] destination:[[documentsFolders objectAtIndex:0] stringByAppendingPathComponent:@"audio.m4a"]] autorelease]; NSLog(@"destinatiion path is %@",[[documentsFolders objectAtIndex:0]stringByAppendingFormat:@"audio.m4a"]); ((UIButton*)sender).enabled = NO; [self.spinner startAnimating]; self.progressView.progress = 0.0; self.progressView.hidden = NO; [audioConverter start]; } - (IBAction)playConverted:(id)sender { if ( audioPlayer ) { [audioPlayer stop]; [audioPlayer release]; audioPlayer = nil; [(UIButton*)sender setTitle:@"Play converted" forState:UIControlStateNormal]; } else { NSArray *documentsFolders = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *path = [[documentsFolders objectAtIndex:0] stringByAppendingPathComponent:@"audio.m4a"]; audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL]; [audioPlayer play]; [(UIButton*)sender setTitle:@"Stop" forState:UIControlStateNormal]; } } - (IBAction)emailConverted:(id)sender { NSArray *documentsFolders = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *path = [[documentsFolders objectAtIndex:0] stringByAppendingPathComponent:@"audio.m4a"]; MFMailComposeViewController *mailController = [[MFMailComposeViewController alloc] init]; mailController.mailComposeDelegate = self; [mailController setSubject:NSLocalizedString(@"Recording", @"")]; [mailController addAttachmentData:[NSData dataWithContentsOfMappedFile:path] mimeType:@"audio/mp4a-latm" fileName:[path lastPathComponent]]; [self presentModalViewController:mailController animated:YES]; } #pragma mark - Audio converter delegate -(void)AACAudioConverter:(TPAACAudioConverter *)converter didMakeProgress:(CGFloat)progress { self.progressView.progress = progress; } -(void)AACAudioConverterDidFinishConversion:(TPAACAudioConverter *)converter { self.progressView.hidden = YES; [self.spinner stopAnimating]; self.convertButton.enabled = YES; self.playConvertedButton.enabled = YES; self.emailConvertedButton.enabled = YES; audioConverter = nil; } -(void)AACAudioConverter:(TPAACAudioConverter *)converter didFailWithError:(NSError *)error { [[[[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Converting audio", @"") message:[NSString stringWithFormat:NSLocalizedString(@"Couldn't convert audio: %@", @""), [error localizedDescription]] delegate:nil cancelButtonTitle:nil otherButtonTitles:NSLocalizedString(@"OK", @""), nil] autorelease] show]; self.convertButton.enabled = YES; audioConverter = nil; } </code></pre>
 

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