通过 AVAudioRecorder 录制声音

Posted 2023-02-25

【中文标题】通过 AVAudioRecorder 录制声音

【英文标题】：Record the sound through AVAudioRecorder

【发布时间】：2013-03-14 09:49:07

【问题描述】：

我想录制声音并想将录制的文件保存到文档目录中：- 做过喜欢：-

[[AVAudiosession sharedInstance]
         setCategory: AVAudioSessionCategoryRecord
         error: nil];
    NSMutableDictionary *recordSetting = [[NSMutableDictionary alloc] init];
    [recordSetting setValue :[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey];
    [recordSetting setValue:[NSNumber numberWithFloat:16000.0] forKey:AVSampleRateKey];
    [recordSetting setValue:[NSNumber numberWithInt: 1] forKey:AVNumberOfChannelsKey];

        recorderFilePath = [[NSString stringWithFormat:@"%@/Audio.caf", DOCUMENTS_FOLDER] retain];
        NSURL *soundFileURL=[NSURL URLWithString:recorderFilePath];

    recorderFilePath = [[NSString stringWithFormat:@"%@/Audio.caf", DOCUMENTS_FOLDER] retain];

    NSURL *soundFileURL = [NSURL fileURLWithPath:recorderFilePath];


        NSLog(@"str==>%@ soundurl==>%@",recorderFilePath,soundFileURL);
        AVAudioRecorder *newRecorder =
        [[AVAudioRecorder alloc] initWithURL: url
                                    settings: settings
                                       error: nil];

 newRecorder.delegate = self;
        [newRecorder prepareToRecord];
        [newRecorder record];

和[录音机停止]；当停止录制完成时。

看过这个：- this

并相应编码..但我仍然无法在文档文件夹中创建任何 .caf 文件。

【参考方案1】：

一旦完成下面的代码，它可能会对您有所帮助。 首先将 AVAudioRecorder 的对象作为 AVAudioRecorder *audioRecorder;

-(void)viewWillAppear:(BOOL)animated

    NSArray *dirPaths;
    NSString *docsDir;

    dirPaths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
    //here i took cache directory as saved directory you can also take   NSDocumentDirectory
    docsDir = [dirPaths objectAtIndex:0];

    NSString *soundFilePath = [docsDir stringByAppendingPathComponent:@"sound.caf"];//at this path your recorded audio will be saved

    NSURL *soundFileURL = [NSURL fileURLWithPath:soundFilePath];

    NSDictionary *recordSettings = [NSDictionary dictionaryWithObjectsAndKeys:

                                                    [NSNumber numberWithInt:AVAudioQualityMin],
                                                    AVEncoderAudioQualityKey,

                                                    [NSNumber numberWithInt:16], 
                                                    AVEncoderBitRateKey,

                                                    [NSNumber numberWithInt: 2], 
                                                    AVNumberOfChannelsKey,

                                                    [NSNumber numberWithFloat:44100.0], 
                                                    AVSampleRateKey,
                                                    nil];

    NSError *error = nil;
    audioRecorder = [[AVAudioRecorder alloc]initWithURL:soundFileURL settings:recordSettings error:&error];

    if( !audioRecorder ) 

        UIAlertView *alert  =
        [[UIAlertView alloc] initWithTitle: @"Warning" message: [error localizedDescription] delegate: nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
        return;

    

    if ( error )
    
        NSLog( @"error: %@", [error localizedDescription] );
    
    else 
        [audioRecorder prepareToRecord];
        [self recordAudio];//Mehod to Record Audio
    

现在定义录制音频的方法，

 -(void) recordAudio
 
     if (!audioRecorder.recording)
      
       audioRecorder.delegate = self;
      [audioRecorder recordForDuration:10];//Here i took record duration as 10 secs 

     

现在您可以将 AvAudio 记录 DelegateMethods 编写为，

-(void)audioRecorderDidFinishRecording:(AVAudioRecorder *)recorder successfully:      (BOOL)flag
 
  //Your code after sucessful recording;
 
-(void)audioRecorderEncodeErrorDidOccur:(AVAudioRecorder *)recorder error:(NSError *)error
 
NSLog(@"Encode Error occurred");

希望对你有帮助...

【讨论】：

感谢您的回复。我尝试使用这个..声音文件也被创建..但无法从该文件中听到任何声音

抱歉，先录制音频，然后播放缓存目录下名为 sound.caf 的音频文件

是的，我从快速播放器中播放了 sound.caf。但什么也听不到

确保你的声音没有静音。因为我在这里使用了这段代码，对我来说工作正常

你有 10 秒时长的音频吗？