BASEPATH="/media/matt/DATA/Flow_Processing/fvv/rafa_1_ifsc/STEA_flow/"

FRSTFRM=00030
LSTFRM=00270

FRSTCAM=001
LSTCAM=012

for cam in $(eval echo "{$FRSTCAM..$LSTCAM}")
do
 for frame in $(eval echo "{$FRSTFRM..$LSTFRM}")
 do

  SRC="${BASEPATH}${cam}/flow/FFV_0_${cam}_${frame}_flow.flo"
  DST="${BASEPATH}${cam}/flow/FFV_2_${cam}_$frame.flo"

  mv -f $SRC $DST

 done
done

FVV_0_<cam num>_<frame num>_flow.flo

FVV_2_<cam num>_<frame num>.flo

FVV_0_001_00001_flow.flo

FVV_2_001_00001.flo