-track \
clip1.dv \
-transition \
-region \
-composite.start=10%,10%:20%x20% \
-composite.key[33]=30%,70%:25%x25% \
-composite.key[66]=70%,30%:15%x15% \
-composite.end=70%,70%:20%x20% \
+region:circle \
+composite.geometry="10%,10%:20%x20%;33=30%,70%:25%x25%;66=70%,30%:15%x15%;-1=70%,70%:20%x20%" \
composite.out=100 \
+composite.softness=0.1 \
a_track=0 \
b_track=1 \
in=0 \