How to play sound with Qt

Question

How can I play sound with Qt? I tried this:

QSound::play("sounds/croack.wav");

QSound doesn't work on my ubuntu (seems that it requires NAS, although after I installed it it still doesn't work). Is there a simple one line Qt-only solution or do I need to throw in SDL or something else?

I tried QSound on Ubuntu, Windows and Mac and they all worked just fine. — Donald Duck, Aug 04 '17 at 10:44

score 8 · Answer 1 · answered Apr 10 '16 at 07:54

8

You can use QMediaPlayer for both files format .mp3 and .wav

#include <QtMultimedia/QMediaPlayer>

QMediaPlayer *player = new QMediaPlayer;
player->setMedia(QUrl::fromLocalFile("/path"));
player->setVolume(50);
player->play();

answered Apr 10 '16 at 07:54

Am.sheikhjafari

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But make sure a platform codec is installed for MP3. – NoDataDumpNoContribution Jul 28 '17 at 22:29
1

You must ensure that in the ".pro" file is included multimedia: QT += multimedia – oml Jun 18 '20 at 18:30

Frank Osterfeld · Answer 2 · 2010-12-19T12:53:00.387

5

Try with phonon. It's far more powerful than QSound. Here's a minimal example to play a video file. If you omit the VideoWidget, it should just play audio.

#include <QApplication>
#include <QUrl>

#include <phonon/audiooutput.h>
#include <phonon/mediaobject.h>
#include <phonon/mediasource.h>
#include <phonon/videowidget.h>

using namespace Phonon;

int main( int argc, char** argv ) {
    QApplication app( argc, argv );
    app.setApplicationName( QLatin1String("testphonon") );
    const QUrl url = QUrl( QLatin1String("file:///somepath/somefile") );
    MediaSource src( url );
    MediaObject obj;
    obj.setCurrentSource( src );
    VideoWidget video;
    video.show();
    AudioOutput audio( VideoCategory );
    Phonon::createPath( &obj, &video );
    Phonon::createPath( &obj, &audio );
    obj.play();
    return app.exec();
}

edited Dec 19 '10 at 12:53

answered Dec 17 '10 at 21:08

Frank Osterfeld

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I tried, but this does not work on my ubuntu, no sound is played. – Giovanni Funchal Dec 17 '10 at 22:43
@Helltone: Phonon is just a wrapper around native backends like gstreamer. If phonon doesn't work, it's either a problem with that backend (if one format works but another not it usually is), or with phonon not configured correctly. Check if some gstreamer-using video player has the same problems. – Frank Osterfeld Dec 18 '10 at 15:20
Is phonon standard? Which headers should I include? – Giovanni Funchal Dec 19 '10 at 12:32
@Helltone: What do you mean by standard? It's the API Qt provides for multimedia. My includes for the above example are , , , – Frank Osterfeld Dec 19 '10 at 12:49
This only work on Linux, some cross-platform Qt solution? – Petr Oct 07 '15 at 14:10
@Petr: These days I'd use qtmultimedia (http://doc.qt.io/qt-5/qtmultimedia-index.html) for that. – Frank Osterfeld Oct 07 '15 at 14:44

score 4 · Answer 3 · edited May 23 '17 at 11:46

In QT5, Phonon has been removed from the official build. QSound works for the most part, but note that QSound does not support playing wave files with all sample rates( as I discovered the hard way). QT5 QSound does not play all wave files.

If you use QSound, you can just play a wave like you did; but make sure you are playing a file from a disk; not a QT resource. Since the resources are not supported yet. You can copy a wave file from a resource to a harddrive on the fly and then play it; which is what I am doing in my application.

score 4 · Answer 4 · answered Dec 17 '10 at 21:21

4

You have a few options:

QSound (which is broken beyond repair - don't use it)
Phonon (will do what you want, but I found it to be "too much", especially when you just want to play a few notification sounds)
Other libraries like SDL.

answered Dec 17 '10 at 21:21

BastiBen

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can u provide an example of just playing a sound? – Giovanni Funchal Dec 17 '10 at 22:44

score 3 · Accepted Answer · answered Dec 17 '10 at 23:07

3

Ok I have some progress, I can play ogg files but not wav (dunno why).

#include <QtGui>
#include <phonon/phonon>

int main(int argc, char* argv[]) {
    QApplication app( argc, argv );
    app.setApplicationName("bla");
    Phonon::MediaObject *mediaObject = Phonon::createPlayer(Phonon::NoCategory, Phonon::MediaSource("sounds/4.wav"));
    mediaObject->play();
    return app.exec();
}

Compiled with g++ ``pkg-config QtGui phonon --cflags --libs``.

answered Dec 17 '10 at 23:07

Giovanni Funchal

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I really appreciate having such a minimal example, it's what finally let me get it to work. Thank you! – daveagp Jan 19 '15 at 23:17

score 2 · Answer 6 · answered May 10 '19 at 04:51

2

I got that trouble too, i've solved it installing this package

qtmultimedia5-dev

and including in the ".pro" file

QT += multimedia

answered May 10 '19 at 04:51

Jorge Luis

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How to play sound with Qt

6 Answers6

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