How can i change the background from my animation in compsitor? I created an animation-a turntable-and i want to change my background color .I can do this in the compositor? I know i can do this from the world tab but i used a Hdri and i cant change the color without influence the light.I can do this if i render the animation as pictures?

I am using cycles
You can change the color of the background in the compositor with the environment pass and either an alpha over node or a mix node.