How to change speed Animated Image in qml?

[tanthinh1510]

Hi!
I create simple example using AnimatedImage as below:

import QtQuick 2.0
 
Rectangle {
    width: animation.width; height: animation.height + 8
 
    AnimatedImage { id: animation; source: "animation.gif" }
 
    Rectangle {
        property int frames: animation.frameCount
 
        width: 4; height: 8
        x: (animation.width - width) * animation.currentFrame / frames
        y: animation.height
        color: "red"
    }
}

import QtQuick 2.0

Rectangle {
    width: animation.width; height: animation.height + 8

    AnimatedImage { id: animation; source: "animation.gif" }

    Rectangle {
        property int frames: animation.frameCount

        width: 4; height: 8
        x: (animation.width - width) * animation.currentFrame / frames
        y: animation.height
        color: "red"
    }
}

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And now, I have slider, when I changed slider value then speed AnimatedImage changed(increase or decrease)
How to do it?
Thanks!