如何在 QT C++ 中录制和保存音频？

Question

我正在尝试使用 Qt c++ 录制和保存音频文件，这是我的代码。

QAudioRecorder * audioRecorder = new QAudioRecorder();

if(audioRecorder->state() == audioRecorder->StoppedState)
{
    // Set recording Settings
    QAudioEncoderSettings settings;
    settings.setCodec("audio/pcm");     // Not sure what to put here
    settings.setSampleRate(16000);
    settings.setBitRate(32);
    settings.setQuality(QMultimedia::HighQuality);
    settings.setEncodingMode(QMultimedia::ConstantQualityEncoding);

    audioRecorder->setEncodingSettings(settings);

    //Set Audio Input
    audioRecorder->setAudioInput(audioRecorder->defaultAudioInput());

    // Sets Output location where to store the file
    QUrl url("hello.wav");
    audioRecorder->setOutputLocation(QUrl::fromLocalFile("hello.wav"));
    audioRecorder->setContainerFormat("mp3");

    audioRecorder->record();

    qDebug()<<audioRecorder->state();
}
else
{
    qDebug()<<"stopped";
}

但它不保存任何文件，而是显示消息no service found for - "org.qt-project.qt.audiosource"。 如何保存音频文件？

Answer 1

您应该安装一些Qt Multimedia Backend - 检查此列表（适合您使用的 Qt 版本）并为您的操作系统选择后端。