一.本文目的

实现在Qt中接收麦克风数据并保存为WAV文件，使用QAudioInput来录音，并使用QFile来保存数据到WAV文件。

开发环境：QT5.12

    本文用极简代码实现，核心代码只需不到100行。

    完整工程代码文末链接可以直接下载。

   

二.代码实现

（1）main.cpp

#include "audiorecorder.h"

#include <QtWidgets>

int main(int argc, char *argv[])

{

    QApplication app(argc, argv);

    AudioRecorder recorder;

    recorder.show();

    return app.exec();

}

2.audiorecorder.h

#ifndef AUDIORECORDER_H

#define AUDIORECORDER_H

#include <QMainWindow>

#include <QMediaRecorder>

#include <QUrl>

QT_BEGIN_NAMESPACE

namespace Ui { class AudioRecorder; }

class QAudioRecorder;

class QAudioProbe;

QT_END_NAMESPACE

class AudioRecorder : public QMainWindow

{

    Q_OBJECT

public:

    AudioRecorder();

private slots:

    void on_outputButton_clicked();

    void on_recordButton_clicked();

    void updateProgress(qint64 pos);

private:

    Ui::AudioRecorder *ui = nullptr;

    QAudioRecorder *m_audioRecorder = nullptr;

    QAudioProbe *m_probe = nullptr;

};

#endif // AUDIORECORDER_H

3.audiorecorder.cpp

#include "audiorecorder.h"

#include "ui_audiorecorder.h"

#include <QAudioProbe>

#include <QAudioRecorder>

#include <QDir>

#include <QFileDialog>

#include <QMediaRecorder>

#include <QStandardPaths>

AudioRecorder::AudioRecorder()

    : ui(new Ui::AudioRecorder)

{

    ui->setupUi(this);

    m_audioRecorder = new QAudioRecorder(this);

    m_probe = new QAudioProbe(this);

    m_probe->setSource(m_audioRecorder);

    //audio devices

    ui->audioDeviceBox->addItem(tr("Default"), QVariant(QString()));

    for (auto &device: m_audioRecorder->audioInputs()) {

        ui->audioDeviceBox->addItem(device, QVariant(device));

        qDebug()<<"device:"<<device;

    }

    QAudioEncoderSettings settings;

    settings.setCodec("");  

    settings.setSampleRate(44100);

    settings.setChannelCount(1);  //单通道

    settings.setQuality(QMultimedia::NormalQuality);  

    m_audioRecorder->setEncodingSettings(settings, QVideoEncoderSettings(), "audio/x-wav");

    connect(m_audioRecorder, &QAudioRecorder::durationChanged, this, &AudioRecorder::updateProgress);

}

void AudioRecorder::on_outputButton_clicked()

{

    QString fileName = QFileDialog::getSaveFileName();

    m_audioRecorder->setOutputLocation(QUrl::fromLocalFile(fileName));

}

void AudioRecorder::on_recordButton_clicked()

{

    if(ui->recordButton->text() == "Record")

    {

        m_audioRecorder->record();

        ui->recordButton->setText("Pause");

    }

    else if(ui->recordButton->text() == "Pause")

    {

        m_audioRecorder->stop();

        ui->recordButton->setText("Record");

    }

}

void AudioRecorder::updateProgress(qint64 duration)

{

    if (m_audioRecorder->error() != QMediaRecorder::NoError || duration < 1000)

        return;

    ui->statusbar->showMessage(tr("Recorded %1 sec").arg(duration / 1000));

}

三.工程代码下载

https://download.csdn.net/download/xieliru/89398205