Changing Audio Sample Rate with QMediaRecord

lightshade

Dear ANYONE that can help me,

I've been racking my brain and fighting with this Library trying to record audio with 1 channel and 16000 hz so that I can send it through an API. ive tried EVERYTHING. when i use recorder.audioChannelCount(); and recorder.audioSampleRate(); they are both correct but when I look at the details of the .wav file and when I try sending the file both say my sample rate is 48000hz with 2 channels. any help would be greatly appreciated!

void AudioHandler::startRecording(const QString &outputFile)
{
    recorder.setQuality(QMediaRecorder::HighQuality);

    QString projectDir = QDir(QCoreApplication::applicationDirPath()).absolutePath();
    QString filePath = QDir(projectDir).filePath(outputFile);

    recorder.setOutputLocation(QUrl::fromLocalFile(filePath));

    QMediaFormat format;
    format.setFileFormat(QMediaFormat::Wave);

    recorder.setMediaFormat(format);

    recorder.setAudioSampleRate(16000);
    recorder.setAudioChannelCount(1);

    recorder.record();

    qDebug() << "Recording started with sample rate" << recorder.audioSampleRate();
    qDebug() << "Recording started with channel count" << recorder.audioChannelCount();
}


void AudioHandler::stopRecording()
{
    recorder.stop();
}

Bonnie

What's your OS and Qt version?
If you are using Qt6 with ffmpeg backend, there had been this issue in ffmpeg plugin.
It is fixed now and should have been merged in the upcoming 6.8.3/6.9.0 release.

lightshade

im on Windows with version 6.8.2

Thanks for letting me know! I figured out another work around so for now I should be good!