Does "playbackRate" property in Audio component work at all?

[Amir Afendin]

I use qt 5.12. When I try to set playbackRate property of Audio component, I dont' see any effect. I tried values from 0.1 to 2.0.

[fcarney]

Works fine for me:
Qt 5.12.9
Linux

You will need to provide your own sound. Mine is in a qrc file with "sound" prefix.

import QtQuick 2.12
import QtQuick.Window 2.12
import QtMultimedia 5.12
import QtQuick.Controls 2.12

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Audio Test")

    Button {
        id: button

        text: "play sound"
        onClicked: {
            console.log(text)
            audio.play()
        }
    }
    Slider {
        id: slider

        anchors.top: button.bottom

        from: 0.1
        to: 2.0
        value: 1.0

        width: 200
    }

    Audio {
        id: audio

        playbackRate: slider.value

        source: "sound/haha.ogg"
    }
}

[Amir Afendin]

@fcarney
What about mp3 sounds that are in playlist and loaded from arbitrary folder on the system and not from qrc file?

[fcarney]

@Amir-Afendin said in Does "playbackRate" property in Audio component work at all?:

mp3 sounds that are in playlist and loaded from arbitrary folder

I put in a fixed url: file:///home/fcarney/Music/melting.mp3
It played just fine. I could adjust the playback rate. However, for all sounds you cannot adjust rate while it is playing. It only seems to accept rate when it starts playing back.

[Amir Afendin]

@fcarney

Audio {
        source: "file:///home/amir/Downloads/beautiful.mp3"
        playbackRate: 0.5
        onStatusChanged: play()
    }

Mine isn't working. I tried different values on playbackRate but it plays normal speed. Xubuntu18.04 / Qt 5.12.7