AVAudioRecorder - 最后裁剪/修剪录音

Posted 2023-02-25

【中文标题】AVAudioRecorder - 最后裁剪/修剪录音

【英文标题】：AVAudioRecorder - crops / trims voice recordings at the end

【发布时间】：2013-10-02 13:51:26

【问题描述】：

我正在将应用程序中的单个单词语音录制到 .wav 文件中

我在录制内容时遇到了问题。例如，如果我记录自己说：“明天”，实际的 .wav 文件将记录“明天”或类似的内容。

我通过 http post 发送语音文件，以便听到服务器端录制的内容。我不知道如何轻松听到我在 iphone 上录制的内容。

以下是应用程序中的一些代码 sn-ps。

非常感谢您的帮助:)

NSArray *pathComponents = [NSArray arrayWithObjects:
                           [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject],
                           @"MyAudioMemo.wav",
                           nil];
NSURL *outputFileURL = [NSURL fileURLWithPathComponents:pathComponents];

// Setup audio session
AVAudiosession *session = [AVAudioSession sharedInstance];
[session setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];

// Define the recorder setting
NSDictionary *recordSetting = [[NSDictionary alloc] initWithObjectsAndKeys:
                               [NSNumber numberWithFloat: 8000.0],AVSampleRateKey,
                               [NSNumber numberWithInt: kAudioFormatLinearPCM],AVFormatIDKey,// kAudioFormatLinearPCM
                               [NSNumber numberWithInt:16],AVLinearPCMBitDepthKey,
                               [NSNumber numberWithInt: 1], AVNumberOfChannelsKey,
                               [NSNumber numberWithBool:NO],AVLinearPCMIsBigEndianKey,
                               [NSNumber numberWithBool:NO],AVLinearPCMIsFloatKey,
                               [NSNumber numberWithInt: AVAudioQualityMedium],AVEncoderAudioQualityKey,nil];

// Initiate and prepare the recorder
NSError * error;
m_recorder = [[AVAudioRecorder alloc] initWithURL:outputFileURL settings:recordSetting error:&error];
if (error)
    NSLog(@"Error init recorder%@", error.description);

    [self setError:@"Failed to init recorder"];        

m_recorder.delegate = self;
m_recorder.meteringEnabled = YES;
[m_recorder prepareToRecord];

....

- (void) startRecord
    AVAudioSession *session = [AVAudioSession sharedInstance];
    [session setActive:YES error:nil];

    // Start recording
    [m_recorder record];
    [self.RecordPauseButton setTitle:@"Stop" forState:UIControlStateNormal];   


- (void) stopRecord
    AVAudioSession *session = [AVAudioSession sharedInstance];
    [session setActive:NO error:nil];

    // Stop Recording
    [m_recorder stop];
    [self.RecordPauseButton setTitle:@"Record" forState:UIControlStateNormal];

    if (!self.ResultsViewController)
        self.ResultsViewController = [[ResultsViewController alloc] initWithNibName:@"ResultsViewController" bundle:nil];
    

    [NSTimer scheduledTimerWithTimeInterval:1
                                     target:self
                                   selector:@selector(callProxyAndMoveScreen:)
                                   userInfo:nil
                                    repeats:NO];
    [self.RecordPauseButton setEnabled:NO];
    [self enterWaitState];


- (void) callProxyAndMoveScreen: (NSTimer *)timer
    self.ResultsViewController.SearchResults = [tusearchProxy searchWithVoice:[m_recorder url]];
    [self.navigationController pushViewController:self.ResultsViewController animated:YES];

    [self exitWaitState];

【参考方案1】：

也许可以通过使用 AVAudioPlayer 来检查客户端录制是否正常。一个简单的方法是在录制完成时调用的委托方法中播放文件。

- (void) audioRecorderDidFinishRecording:(AVAudioRecorder *)avrecorder successfully:(BOOL)flag;

这可能是一段代码来解决这个问题。

 - (void) audioRecorderDidFinishRecording:(AVAudioRecorder *)avrecorder successfully:(BOOL)flag
    AVAudioPlayer *tempPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:avrecorder.url error:nil];
    tempPlayer.numberOfLoops = 0;
    [tempPlayer play];

如果事实证明它太快将其切断一秒，请在延迟 1 秒或任何情况下调用您的“stopRecord”函数。

希望对你有帮助