This Nuke script will convert Roto/Trackers to SplineWarp and expression 'freeze' on a desired frame. Basically this allows you to matchmove the freeze frame OR stabilize plates with SplineWarps
This version is an upgrade and replaces both
https://github.com/magnoborgo/FreezeSplineWarp2/
https://github.com/magnoborgo/RotoPaintToSplineWarp2