   Interesting Shader Problem when there is a video playing
  Hi all ,I am rendering an animated fire , D3D9 and SM2 version of this : http://www.rastertek.com/dx10tut33.htmlBasically it renders a quad and uses 3 textures (diffuse ,noise,alpha) and takes frame counter as inputto animated the fire on a texture.The interesting problem I faced is , when there is a video playing in my system or in existence ofsome specific applications ( such as Gtalk ) , animation speed reduces dramatically.Do you have any idea what causes this problem , any Directshow/DXVA issue ?   