How to Animate an Image with more than 256 colors (i.e. not a GIF) using AnimatedImage or otherwise

I can use AnimatedImage in Qt 5.9 which works on GIFs like this;

import QtQuick 2.7
import QtQuick.Controls 2.2

ApplicationWindow
{
    visible: true
    width: 640
    height: 480

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

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

        Rectangle {

            height: 8
            width: animation.currentFrame/animation.frameCount * animation.width
            y: animation.height
            color: "red"

            Component.onCompleted: console.log("framecount ", animation.frameCount);
        }
    }
}

I get a lot of error messages too. This is printed over and over;

QQmlExpression: Expression qrc:/main.qml:26:20 depends on non-NOTIFYable properties:
    QQuickAnimatedImage::frameCount

I took my example code from here; http://doc.qt.io/qt-5/qml-qtquick-animatedimage.html

which doen't work at all, something wrong with putting frameCount into a property, so i changed that in my version.

I would like to animate a png like an apng. Apparently there used to be mng support, but it is not there anymore.

So i call QMovie::supportedFormats which returns only GIF (on Windows).

My question:

How can i either use AnimatedImage on a format that supports non-palettised color (eg png etc) or is there another way to animate an image that would work?

Thanks for any info.

Solution

It seems like those image formats are not shipped with the standard installation of Qt/QML. You can however install them as a plugin.

See: