Qt实现麦克风音频输入保存wav文件

2025-10-22 23:28:11

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

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

#include

#include

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

#include

#include

#include

#include

#include

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:"<

}

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