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Unable to play audio from Qt

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  • J Offline
    J Offline
    jigarp
    wrote on last edited by
    #1

    Hello I'm using Qt 5.9.6 on beagleboard-x15

    I'm able to play audio using aplay <filepath.wav>
    aplay -l list my available soundcard
    While trying to play audio using Qt as provided on QMediaPlayer it is not playing
    Qt can detect my soundcard using below method

        foreach (const QAudioDeviceInfo &deviceInfo, QAudioDeviceInfo::availableDevices(QAudio::AudioOutput)) {
            qDebug() << "Device name: " << deviceInfo.deviceName() ;
        } 
        qDebug() << "Default Output" << QAudioDeviceInfo::defaultOutputDevice().deviceName();
    
    

    Where Default Output shows null

    Here is my method how i'm trying to play audio file

        tMediaPlayer = new QMediaPlayer(this);
    
        tMediaPlayer->setMedia(QUrl::fromLocalFile("file:/home/root/audio/instrument.wav"));
        connect(tMediaPlayer, SIGNAL(positionChanged(qint64)), this, SLOT(positionChanged(qint64)));
        tMediaPlayer->setVolume(90);
        tMediaPlayer->play();
    

    Even tMediaPlayer->error() return NoError

    A 1 Reply Last reply
    0
    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Hi,

      What if you remove the file: prefix ? There's no need for it, fromLocalFile takes a normal path.

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

      1 Reply Last reply
      1
      • J jigarp

        Hello I'm using Qt 5.9.6 on beagleboard-x15

        I'm able to play audio using aplay <filepath.wav>
        aplay -l list my available soundcard
        While trying to play audio using Qt as provided on QMediaPlayer it is not playing
        Qt can detect my soundcard using below method

            foreach (const QAudioDeviceInfo &deviceInfo, QAudioDeviceInfo::availableDevices(QAudio::AudioOutput)) {
                qDebug() << "Device name: " << deviceInfo.deviceName() ;
            } 
            qDebug() << "Default Output" << QAudioDeviceInfo::defaultOutputDevice().deviceName();
        
        

        Where Default Output shows null

        Here is my method how i'm trying to play audio file

            tMediaPlayer = new QMediaPlayer(this);
        
            tMediaPlayer->setMedia(QUrl::fromLocalFile("file:/home/root/audio/instrument.wav"));
            connect(tMediaPlayer, SIGNAL(positionChanged(qint64)), this, SLOT(positionChanged(qint64)));
            tMediaPlayer->setVolume(90);
            tMediaPlayer->play();
        

        Even tMediaPlayer->error() return NoError

        A Offline
        A Offline
        anil_arise
        wrote on last edited by
        #3

        @jigarp Is Qmediaplayer play other format of audio example .mp3 on your system?

        1 Reply Last reply
        0

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