> inigo -filter autotrack_rectangle:X,Y:WxH obscure=1 <movie_file>
+There is now a slow motion producer that does interpolation based on the motion vectors:
+
+ > inigo slowmotion:<movie_file> _speed=0.1 method=1 debug=1
+
NOTES (and deficiencies):
1. Ignore shot change detection when your using the autotrack_rectangle filter.