Blender renders the input video instead of Composite node I stabilized a video in the Movie Clip Editor and used the result as a Stabilize 2D block in the Node Editor. But, when I animate it, it is reproducing the original video, instead of the Composite block.

I followed a Blender 2.72 tutorial by the letter, so it could have something to do with the version, but why would Blender get the input instead of the output? What am I doing wrong?
I solved it by trial and error. The Video Sequence Editor didn't have the scene strip. I thought the Composite block alone would override it if it were empty.