import QtQuick
import QtMultimedia

Window {
    id: window
    width: 640
    height: 480
    visible: true

    VideoOutput {
        id: vo
        anchors.fill: parent
        onSourceRectChanged: console.log(sourceRect) // <-- ASSERT HERE
    }

    MediaPlayer {
        videoOutput: vo
        source: "https://bugreports.qt.io/secure/attachment/122241/sample.mp4"
        onMediaStatusChanged: {
            if (mediaStatus == MediaPlayer.LoadedMedia)
                play()
        }
    }
}