Problems with taking photo

Hi why Titanium.Media.showCamera show image preview with wrong aspect ratio? how i can set full screen aspect ratio? (same if i change orientation the aspect ration is all wrong)

this is my code index.js:

var currentCamera = Titanium.Media.CAMERA_REAR;
 
function takePicture(){
    Titanium.Media.takePicture();
}
 
function switchCamera(){
    if(currentCamera == Titanium.Media.CAMERA_REAR){
        Titanium.Media.switchCamera(Titanium.Media.CAMERA_FRONT);
        currentCamera = Titanium.Media.CAMERA_FRONT;
    }else{
        Titanium.Media.switchCamera(Titanium.Media.CAMERA_REAR);
        currentCamera = Titanium.Media.CAMERA_REAR;
    }
}
 
$.win.addEventListener('focus',function(){
    Titanium.Media.showCamera({
 
        success:function(event)
        {
            alert(JSON.stringify(event));
            Ti.Media.hideCamera();
        },
        cancel:function()
        {
        },
        error:function(error)
        {
            var a = Titanium.UI.createAlertDialog({title:'Camera'});
            if (error.code == Titanium.Media.NO_CAMERA)
            {
                a.setMessage('Please run this test on device');
            }
            else
            {
                a.setMessage('Unexpected error: ' + error.code);
            }
            a.show();
        },
        overlay:$.overlay,
        showControls:false, // don't show system controls
        mediaTypes:Ti.Media.MEDIA_TYPE_PHOTO,
        autohide:false // tell the system not to auto-hide and we'll do it ourself
    });
});
$.win.open();

<Alloy>
    <Window id="win" class="container">
    </Window>
 
    <View id="overlay">
            <Button id="changecamera" onClick="switchCamera"/>
            <Button id="takephoto" onClick="takePicture"/>
            <Button id="takevideo" />
        </View>
</Alloy>

".container": {
    width:Ti.UI.FILL,
    height:Ti.UI.FILL,
    backgroundColor:'black',
    tintColor:"#FFF"
}
 
"#overlay":{
    width:Ti.UI.FILL,
    height:Ti.UI.FILL,
    backgroundColor:'transparent',
}
 
"#changecamera":{
    width:Ti.UI.SIZE,
    height:Ti.UI.SIZE,
    image:'/images/ico/flipcamera.png',
    tintColor:'#FFF',
    top:20,
    right:30
}
 
 
"#takephoto":{
    width:Ti.UI.SIZE,
    height:Ti.UI.SIZE,
    image:'/images/ico/takephoto.png',
    bottom:50,
    tintColor:'#FFF',
 
}
 
"#takevideo":{
    width:Ti.UI.SIZE,
    height:Ti.UI.SIZE,
    image:'/images/ico/video.png',
    tintColor:'#FFF',
    bottom:70,
    right:30,
}