--filter greyscale track=3 \
--transition composite:41%,11%:100%x100%:50 out=1000 a_track=0 b_track=2 \
--transition composite:40%,10%:100%x100% out=1000 a_track=0 b_track=1 \
--transition composite:85%,80%:10%x10%:30 out=1000 a_track=0 b_track=3 \
+-track clip3.dv \
+-filter greyscale track=2 \
+-transition composite:21%/11%:100%x100%:50 end=61%/41%:100%x100% out=99 a_track=3 b_track=1 \
+-transition composite:20%/10%:100%x100% end=60%/40%:100%x100% out=99 a_track=3 b_track=0 \
+-transition composite:85%/80%:10%x10%:30 out=1000 a_track=3 b_track=2 \