如何将XAML / WPF文件转换为视频（AVI，WMV等）

I have a simple WPF (XAML) file that has some animated shapes and text. The animation has no interactive behavior. I want to record this animation as a video file that I later intend to use as the "intro" screen to a screencast.I have a simple WPF (XAML) file that has some a