QML Video muting

I have a video component and video file and i need to play only video without any sound.
So, i used "muted" property to switch off volume.
But after first playing from begin to end (from "play" to "stop") "muted" is changed to false and i can't change it any more.
This is my code:

Video {
source: "file:///home/user/video.mp4"
muted: true
onMutedChanged: {
print("mutedBefore:" + muted);
muted = Qt.binding(function ()

{return true;}

);
print("mutedAfter:" + muted);
}
onPlaying:

{ print("Playing"); }

onStopped:

{ print("Stopped"); }

}

And this is the log:

mutedBefore:true
mutedAfter:true
mutedBefore:true
mutedAfter:true
Playing
Stopped
Playing
mutedBefore:false
mutedAfter:false
Stopped

As the line: properties "muted" and "volume" unchangeable after video is stopped by itself at the end.