public void Render(Rectangle subsRect, Rectangle frameRect, int xOffsetInPixels)
{
Rectangle r = posRelativeToFrame ? frameRect : subsRect;
int posY = adjustPosY * r.Height / GUIGraphicsContext.Height;
MpcSubtitles.Render(r.X, r.Y + posY, r.Width, r.Height, xOffsetInPixels);
}