inigo \
-clip1.dv \
-out=199 \
+-blank 49 \
+clip2.dv in=100 \
-track \
--blank 59 \
-clip2.dv \
-in=100 \
-out=239 \
+clip1.dv out=99 \
-transition \
-composite \
-start=0,0:100%x100%:0 \
-key[5]=0,0:100%x100%:100 \
-end=0,0:100%x100%:100 \
-in=60 \
-out=199 \
-a_track=0 \
-b_track=1 \
+mix start=0 end=1 in=49 out=50 a_track=1 b_track=0 \
+-transition \
+mix:1 in=51 out=99 a_track=1 b_track=0 \
$*