How to take a snapshot of video control?

I have an mx:Video object that plays live streaming vid开发者_如何转开发eo. How can I take a snapshot of that video?

Suppose your VideoDisplay object is called "v":

<mx:VideoDisplay id="v" source="..." ... />

Then you can draw the contents onto a Bitmap object like so:

var bd:BitmapData = new BitmapData(v.width, v.height);
bd.draw(v);

var b:Bitmap = new Bitmap(bd);

Now the Bitmap object has a snapshot of the video.