Media size using OSMF

Hi,

I am playing around with the OSMF plug in and I am trying to set the size of the SWF to the size of the media in the MediaPlayerSprite. I can set the media to the size of the SWF but I want the other way round, the SWF to the size of the media. I have two questions:

1.     Is it possible to load a media (FLV, jpg etc) and then set the size of the SWF

2.     How do you get the size of the media e.g. trace( mediaWidth); trace(mediaHeight);

my code:

var sprite:MediaPlayerSprite = new MediaPlayerSprite();
            addChild(sprite);
            sprite.width=stage.stageWidth;
            sprite.height=stage.stageHeight;
            sprite.x=0;
            sprite.y=0;
            sprite.scaleMode=ScaleMode.STRETCH;

               sprite.resource = new URLResource("5.jpg");
            trace(sprite.stage.stageWidth);
            trace(sprite.stage.stageHeight);