qml video metadata: undefined

[qAminzzz]

hi, i wanna take video meta data but there is a problem

code:

Video
                   {
                       id: videoList
                       anchors.left: parent.Left
                       width: 110
                       height: 80
                       autoLoad: true
                       muted: true
                       volume: 0.4
                       fillMode: Image.PreserveAspectCrop
                       source: "file://" + root.files[modelData]

                       Component.onCompleted:
                       {
                           videoList.seek(1000)
                           print("Size: " + videoList.metaData.resolution)
                       }
}

output:

qml: Size: undefined

regards
amin