9

314 Chapter 19: Video Post-Production
Trou bleshooti ng Video Post
While Video Post offers many useful functions and
creative effects, invariably you will set up a queue
that lo oks like it should work or even appears to
render correctly only to give you an animation that
does not include the desired effect. Here are some
troubleshooting tips to reference when a queue
just isn’t doing what you expect.
There are two key things that can cause a Video
Postqueuetofail.Thefirstisincorrectordering
and nesting of events in the queue. The second is
faulty positioning and/or overlapping of the range
bars.
When you come up again a problem, especially if
you’re attempting to set up a very complex queue,
the best way to diag nose the problem is to create
a new queue that should only result in the effect
that is failing. If you can get the simplified queue
to work, you can compare it to the structure of the
failing queue to see what m ight b e out of order.
Her e are two very common scenarios that look like
they should work but ultimately don’t give you the
result you expected. These examples are shown
in their simplified state, but could very easily be
buried in more complex queues.
• The object simply disappears instead of
fading out.
The first example illustrates a problem where
you expect the scene to render for fif teen frames
before fading to black to finish the animation.
However, at frame sixteen, the scene abruptly
goes black.
This queue shows all the correct events in the
proper order in the queue. The problem is
the timing and positioning of the range bars.
The most likely cause of this problem is using
the Abut Selection (page 3–329) when it’s not
necessary. In order for the Fade event to work
properly, it needs to overlap the animation for
theamountoftimeyouwanttofadetooccur.
You need to ta ke into account the number of
frames where the scene actually fades.
To fix this queue, you have to decide how many
frames over which the fade will occur. Let’s say
youwantthescenetofadetoblackoverten
frames. You would need to drag the right end
of the Perspective event range bar ten f r ames to
the right to overlap the Fade event.
• Theobjectglowsduringrendering,butnot
in the a nimati on.
This second example is even more misleading
than the first. The infuriating thing about this
problem is that while the scene is rendering ,
the object in the scene shows the glow effect.
When the resultant animation is pla yed back,
the Glow effect is not present.
Once again, this queue shows all the correct
events, but the problem here is the ordering