tracking a still picture

[Schmovies production]

i'm lost with this
the tracker is not accepting the still (which is moving by a keyframed dolly in, that's why i need to track it)
Do i have to render the animated still as a movie or there is another solution?
Anticipated merry christmas and happy new year to everybody

 

[Schmovies production]

I've got it. Precomp the layer. That's it.