Webcam GetPixels is only returning black

Hi,

I try to make a picture with the Webcam, but I only get darkness, what could be wrong?
In Start:

WebCamDevice devices = WebCamTexture.devices;
Debug.Log(devices[0].name);
_deviceName = devices[0].name;
wct = new WebCamTexture(_deviceName);
wct.Play();

In a Coroutine, which is then started with StartCoroutine

Texture2D snap = new Texture2D(wct.width, wct.height);
snap.SetPixels(wct.GetPixels());
snap.Apply();

Hey, maybe this answer could help you: