Get and save in a folder the webcam texture

Hi, I have set the webcam stream with:

var webcamTexture : WebCamTexture = WebCamTexture(); renderer.material.mainTexture = webcamTexture; webcamTexture.Play();

now i want take a photo and save it in a folder, i try to use Getpixels(color32[]), but for now don't work... someone can help me?

thanks