Duplicate the clip u want to effect and put the copy on top of it.
With the duplicated clip:
Create a mask around the area u want to effect using crop or one of the matte filters
then apply the blur/filter to the masked clip
– Its a bit prehistoric but will do the trick depending on the material. I definitely try keep this sort of work out of FCP, but to each his/her own..
🙂
L
Mac 10.5.4
FCP 6.04
2 x 2.8ghz Quad Core Intel Xeon
16gb RAM
7 TB Maxx RAID
AJA Kona3