Attached Link: Changing Ball

Like this?

I did this just the way I described.

In this case I found the easiest way was to output the complete video in both versions.

Then I cut them in the middle and put the first part of one with the second part of the other.  Then I just applied a crossover transition.

Whole thing start to end only took 15 minutes.

Mike

If you shoot a mime, do you need a silencer?