一.本文目的

實現在Qt中接收麥克風數據并保存為WAV文件，使用QAudioInput來錄音，并使用QFile來保存數據到WAV文件。

開發環境：QT5.12

????本文用極簡代碼實現，核心代碼只需不到100行。

????完整工程代碼文末鏈接可以直接下載。

???

二.代碼實現

（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); ?//單通道

????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.工程代碼下載

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