public void StopOSD()
{
//IVMRMixerBitmap9 mixerBitmap = this.videoRenderer as IVMRMixerBitmap9;
//// Get current Alpha Bitmap Parameters
//VMR9AlphaBitmap alphaBmp;
//int hr = mixerBitmap.GetAlphaBitmapParameters(out alphaBmp);
//DsError.ThrowExceptionForHR(hr);
//// Disable them
//alphaBmp.dwFlags = VMR9AlphaBitmapFlags.Disable;
//// Update the Alpha Bitmap Parameters
//hr = mixerBitmap.UpdateAlphaBitmapParameters(ref alphaBmp);
//DsError.ThrowExceptionForHR(hr);
}