2 clip3.mpeg in=100 out=299 \
4 colour:black out=49 -blank 99 colour:black out=49 \
6 luma in=0 out=49 a_track=0 b_track=1 reverse=1 \
8 luma in=150 out=199 a_track=0 b_track=1 \
10 volume in=0 out=49 track=0 gain=0 end=1.0 \
12 volume in=150 out=199 track=0 gain=1.0 end=0 \