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iPhone：录制到 CAF 文件仅产生静态

发布于 2024-08-27 06:32:09 字数 170 浏览 14 评论 0原文

我正在开发一个 iPhone 录音应用程序，它可以创建 caf 格式的音频文件。

当我播放这些文件时，我这里唯一的东西是静态的。此外，文件的大小也很大，例如，10 秒的录音可达 1.7 mb。

我可以用其他格式（例如 mp3）录制吗？有人有一些如何执行此操作的示例代码吗？

谢谢

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葮薆情 2024-09-03 06:32:09

您必须使用 AVAudioRecorder 类来执行此操作。
以下是开发人员参考的链接：
然后

，您可以使用以下代码：

// Init audio with record capability
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
    [audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];

// Set recording setting
NSMutableDictionary* recordSetting = [[NSMutableDictionary alloc] init];
    [recordSetting setValue :[NSNumber numberWithInt:kAudioFormatMPEGLayer3] forKey:AVFormatIDKey];
    [recordSetting setValue:[NSNumber numberWithFloat:48000] forKey:AVSampleRateKey]; 
    [recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];
// Create a AVAudioRecorder object
tmpUrl = [NSURL fileURLWithPath:[NSTemporaryDirectory() stringByAppendingPathComponent: [NSString stringWithFormat: @"tmp.mp3"]]];
AVAudioRecorder *recorder = [[AVAudioRecorder alloc] initWithURL:tmpUrl settings:recordSetting error:nil];

// Start the recorder
[recorder record];
// record your voice here
[recorder stop];

// Play recorded sound
AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:tmpUrl error:nil];
[player play];

给你！

You have to use AVAudioRecorder class to do that.
Here is a link to developer reference:
AVAudioRecorder reference

Then, you can use the following code:

// Init audio with record capability
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
    [audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];

// Set recording setting
NSMutableDictionary* recordSetting = [[NSMutableDictionary alloc] init];
    [recordSetting setValue :[NSNumber numberWithInt:kAudioFormatMPEGLayer3] forKey:AVFormatIDKey];
    [recordSetting setValue:[NSNumber numberWithFloat:48000] forKey:AVSampleRateKey]; 
    [recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];
// Create a AVAudioRecorder object
tmpUrl = [NSURL fileURLWithPath:[NSTemporaryDirectory() stringByAppendingPathComponent: [NSString stringWithFormat: @"tmp.mp3"]]];
AVAudioRecorder *recorder = [[AVAudioRecorder alloc] initWithURL:tmpUrl settings:recordSetting error:nil];

// Start the recorder
[recorder record];
// record your voice here
[recorder stop];

// Play recorded sound
AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:tmpUrl error:nil];
[player play];

Here you are !!

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