How to play a .wav file in QT6?

ndias

Hi,

I am unable to play a audio file in QT6. I get this error message:

QSoundEffect(qaudio): Error decoding source ./sounds/clock-alarm-beep.wav

when I use code bellow:

import QtQuick
import QtQuick.Controls

import QtMultimedia

ApplicationWindow {
    visible: true
    width: 400
    height: 600

    SoundEffect {
        id: alarmSound
        //source: "qrc:/sounds/clock-alarm-beep.wav"
        source: "./sounds/pager-beeps.wav"
        //source: "C:/Users/ndias/Desktop/AnalogClock/sounds/clock-alarm-beep.wav"
    }
    MouseArea {
        id: playArea
        anchors.fill: parent
        onPressed: { console.info("PLAY"); alarmSound.play(); }
    }
}

I tried to run this sample code on QT5 without any success except when I use the Audio module instead of SoundEffect and using an absolute source URL of the wav file.
Using SoundEffect in QT5 I same error and using Audio module with QRC or relative path source I get no errors but I was unable to play the file.

Can anyone give me clarifications on how to overcome this problem?

Best regards

PS: QT6 does not have Audio module

Markkyboy

The chances are, the bitrate of the wav file is not in accordance with requirements. Perhaps a wav with 22000hz is not decodable but a wav at 48000hz is. Check your source file.

ndias

Tested with 48kHz sampling rate wav files unsuccessfully (https://www.kozco.com/tech/soundtests.html). I got the same behavior as described in first topic.

SGaist

Hi,

Did you upgrade Qt to 6.2 ?

That said, when using relative paths, did you ensure that the files are stored in the same folder as your application executable ?

ndias

Hi @SGaist,

I tested it using Qt 6.2 and Qt 5.15.2.

I copied .wav file to same folder application executable file. I forgot this detail before. But I still did not succeed to play wav file.

So this moment I am able only to play wav files using absolute source URL when using Audio module (Qt5).

EDIT: I have no problems when using QRC on Android build (Audio and SoundEffect types) 🙂

SGaist

What if you drop the "./" in the path ?

ndias

@SGaist said in How to play a .wav file in QT6?:

What if you drop the "./" in the path ?

I get the same result.

Meanwhile I've been testing the compilation on Android with different sample rates. I get the following warning on the console output if audio file does not contain a 48000Hz sample rate. Despite this, .wav file is played.

W AudioTrack: AUDIO_OUTPUT_FLAG_FAST denied by client; transfer 1, track 44100 Hz, output 48000 Hz

Regards

SGaist

On which platform does it fail ?

ndias

Hi @SGaist

I am using Windows platform.

For Qt5, I tested it with:

Qt5.15.2 MinGW 32-bit
Pyside 2

For Qt6, I used:

qmlscene.exe (6.2.0 MinGW 64-bit) --- Not tested with Qt6.2 MinGW because "QtMultimedia is not currently supported on this platform or compiler"
Pyside 6.2