Video {
                id: video1;
                anchors.fill: parent;
                source: "rafael.flv";
                MouseArea {
                anchors.fill: parent;
                onClicked: {
                    if(video1.hasVideo){
                        video1.play();
                    }
                    else{
                        console.log("no content");
                    }
                }
            }

            focus: true;
            Keys.onSpacePressed: video1.playbackState == MediaPlayer.PlayingState ? video1.pause() : video1.play();
            Keys.onLeftPressed: video1.seek(video1.position - 5000);
            Keys.onRightPressed: video1.seek(video1.position + 5000);
        }

Could anyone tell me the reason? Thanks in advance!