标签: audio-recording

当我从iphone录制音频时如下:

//Setup the dictionary object with all the recording settings that this
            //Recording sessoin will use
            NSMutableDictionary* recordSetting = [[NSMutableDictionary alloc] init];
            [recordSetting setValue :[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey];
            [recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
            [recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];

            //Now that we have our settings we are going to instanciate an instance of our recorder instance.
            //Generate a temp file for use by the recording.
            NSDate *now = [NSDate dateWithTimeIntervalSinceNow:0];
            NSString *caldate = [now description];

            recordedTmpFile = [[NSString stringWithFormat:@"%@/%@.caf", DOCUMENTS_FOLDER, caldate] retain];
            NSLog(@"Using …

我创建了一个从客户端接收声音的服务器应用程序,然后我广播这个存储为字节的声音,并将字节发送回连接到服务器的客户端.现在我只使用一个客户端进行测试,而客户端正在接收语音,但声音一直都是口吃.有人可以告诉我我做错了什么吗？

我想我理解为什么声音播放不顺畅但不明白如何解决问题.

代码是吼叫.

客户端:

将语音发送到服务器的部分

     public void captureAudio()
     {


      Runnable runnable = new Runnable(){

     public void run()
     {
          first=true;
          try {
           final AudioFileFormat.Type fileType = AudioFileFormat.Type.AU;                      
           final AudioFormat format = getFormat();
           DataLine.Info info = new DataLine.Info(TargetDataLine.class, format);
           line = (TargetDataLine)AudioSystem.getLine(info);               
           line.open(format);
           line.start();
                int bufferSize = (int) format.getSampleRate()* format.getFrameSize();
                byte buffer[] = new byte[bufferSize];           

                    out = new ByteArrayOutputStream();
                    objectOutputStream = new BufferedOutputStream(socket.getOutputStream());
                    running = true;
                    try {                      
                        while (running) {                         
                            int count = line.read(buffer, 0, buffer.length);
                            if (count > 0) { …

我试图创建一个音频缓冲区并将他发送到一个新类.在这个类中,我将使用AudioTracker播放此缓冲区,但它不起作用.我可以按时听到声音,但声音就像一个halleffect.我没有想到我的错误,也没有找到这个问题的答案.我希望你能帮助我.(对不起,我的英语不是最好的)Sorcecode:

public class input {
private static final String TAG = "Aufnahme";
private AudioRecord recorder = null;
private boolean isRecording = false;
private int SAMPLERATE = 8000;
private int CHANNELS = AudioFormat.CHANNEL_CONFIGURATION_MONO;
private int AUDIO_FORMAT = AudioFormat.ENCODING_PCM_16BIT;
private int bufferSize = AudioRecord.getMinBufferSize(SAMPLERATE, CHANNELS,
        AUDIO_FORMAT);
private Thread recordingThread = null;

public void startRecording() {
    recorder = new AudioRecord(MediaRecorder.AudioSource.MIC, SAMPLERATE,
            CHANNELS, AUDIO_FORMAT, bufferSize);

    recorder.startRecording();
    isRecording = true;

    recordingThread = new Thread(new Runnable()

    {
        public void run() {
            writeAudioData();
        }

    });
    recordingThread.start();

} …

如何在Android 2.2中使用MediaRecorder 录制M4A 音频文件？
我需要设置什么输出格式,编码器和采样率？

我需要从麦克风录制它并将其保存在SDCARD中

UPDATE

我试过这段代码,但结果无效(例如在浏览器中没有播放):

recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); // error here ?!?
recorder.setAudioSamplingRate(96000); // what value ?

当我使用Androids AudioRecord从麦克风录制时,我得到了这个令人讨厌的神器

有没有办法避免或删除这个？它是什么？或者我得到了,因为我在配置中做错了(但其他一切正常).

这是我的AudioRecord配置:

    sampleRateInHz = 44100;
    channelConfigRec = AudioFormat.CHANNEL_IN_MONO;
    audioFormat = AudioFormat.ENCODING_PCM_16BIT;
    bufferSizeInBytesRec = AudioRecord.getMinBufferSize(sampleRateInHz, channelConfigRec, audioFormat);
    audioSource = AudioSource.MIC;

我很确定我的代码是正确的,因为我可以记录所有内容,但是在开头就有这样的点击.

我正在尝试实现AudioTrack来检索我的android设备中的音频，以接收来自IAX的来电，但过一会儿遇到异常。

private void writeBuff(short[] buf) {

    try {

        if (this.track == null) {
            Log.w("IAX2Audio", "write() without an AudioTrack");
            return;
        }

        int written = 0;
        while (written < buf.length) {


            if (this.track != null) {
                int res;

                res = this.track.write(buf, written, buf.length - written);      
                switch (res) {
                case AudioTrack.ERROR_INVALID_OPERATION:
                    Log.e("IAX2Audio", "Invalid write()");
                    return;
                case AudioTrack.ERROR_BAD_VALUE:
                    Log.e("IAX2Audio", "Bad arguments to write()");
                    return;
                }

                written += res;
            }

        }

    } catch (Exception e) {
        e.printStackTrace();
    }

}

例外在这里

 04-27 18:26:15.865: W/System.err(12681): java.lang.IllegalStateException: Unable …

我在这里和这里找到了两个非常有用的主题.但我需要以某种方式改变扬声器/麦克风流.例如,应用某些效果或停止向用户播放音频.所以我的问题不是关于录音,而是关于真实的音频操控.有没有办法实现这一目标？谢谢.

我开发了一个带有实时视频流的iOS应用程序.我将音频采样率固定为8k.音频在iPhone6设备上运行良好,但是当我在6s和6s中流式传输视频时,音频部分无效.我该如何解决这个问题？我尝试在不同的博客中发现,在iPhone 6s中,采样率锁定在48k.我该如何手动下采样？因为我用于直播的图书馆只能用于8k.请帮我解决这些问题

我正在swift构建一个iOS应用程序,客户端返回了录音的问题,基本上它没有记录任何内容.他在带有ios 9.x的iPhone 5/5s上进行了测试.检查权限,如果手机上有足够的空间,这些都不是问题.

就个人而言,在模拟器上使用带有ios 10.x和iphone 5的iphone 6s设备测试并且记录正在运行.任何人之前遇到过这种情况,或者说我做错了什么让我望而却步.

为不同的功能添加了注释,说明应用程序的功能.

protocol RecordAndPlayManagerDelegate : class{
    func recorderDidStopRecording()
}

class RecordAndPlayManager: NSObject, AVAudioRecorderDelegate {
    var soundRecorder: AVAudioRecorder!
    let recordSettings = [
        AVFormatIDKey: Int(kAudioFormatMPEG4AAC),
        AVSampleRateKey: 12000,
        AVNumberOfChannelsKey: 1,
        AVEncoderAudioQualityKey: AVAudioQuality.high.rawValue
    ]
    class func directoryURL() -> URL? {
        let fileManager = FileManager.default
        let urls = fileManager.urls(for: .documentDirectory, in: .userDomainMask)
        let documentDirectory = urls[0] as URL
        let soundURL = documentDirectory.appendingPathComponent("recording.m4a")
        return soundURL
    }

    //calling this from outside to get the audio
    class func getLocalOrRemoteRecording(_ recordingID : String!) …

所以,我有一个应用程序,当连接到汽车的HFP时,需要使用汽车的麦克风.它在没有BT的情况下工作正常,它可以与BT耳机一起使用,但不适用于HFP - 当它连接到我的汽车的BT时它使用HFP扬声器但不使用麦克风.

我究竟做错了什么？这是Android的bug吗？

private static boolean isBluetoothHeadsetConnected() {
    BluetoothAdapter mBluetoothAdapter = 
    BluetoothAdapter.getDefaultAdapter();
    return mBluetoothAdapter != null && mBluetoothAdapter.isEnabled()
        && 
    mBluetoothAdapter.getProfileConnectionState(BluetoothHeadset.HEADSET) == 
    BluetoothHeadset.STATE_CONNECTED;
}

private boolean checkBlueTooth()  {
    if (!isBluetoothHeadsetConnected()) {
    return false;
    }

    return true;
}

private void useBluetooth() {
    AudioManager audioManager;
    audioManager = (AudioManager) getSystemService(AUDIO_SERVICE);
    audioManager.setMode(AudioManager.MODE_IN_COMMUNICATION);
    audioManager.startBluetoothSco();
    audioManager.setBluetoothScoOn(true);
}

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    if (checkBlueTooth()) {
    start();
    } else {
    BroadcastReceiver scoReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
        if …