How to play video using QML with start video any time?

TamLe

I want to run a sample video using QML .
When i am runnimng the following code :

import QtQuick 6.4
import QtMultimedia
import sample_video

Window {
    width: 800
    height: 600

    visible: true
    title: "sample_video"

    property real time_s: 60000

    Component.onCompleted: {
         mediaplayer.play();
         mediaplayer.position = 5000
    }

    Component.onDestruction: {

    }

    MediaPlayer {
        id: mediaplayer
        source: data.source_video
        // position: 5000
        videoOutput: videoOutput
        onErrorOccurred: (error,errorString)=> {
                             console.log( errorString);
                         }

    }

    VideoOutput {
        id: videoOutput
        anchors.fill: parent
    }
}

however the video play time starts at 0. is there any way i can set this time?
Also this time is taken from c++ side. however in QML there is no support for "long long" type is there any way to handle this problem?

Win 10 - QT6.4.3

Thanks.