I am constantly reminded how much reading helps. While processing clip #16 from the Matriculated short of The Animatrix, I was frustrated at where avisplit was putting the end boundary. I was specifying a specific end frame and avisplit was disregarding it, and I continuously tried to move the end frame with no change. Reading the man for avisplit again I discovered the ‘-m’ option. This forces the split at the upper boundary (end frame number) instead of the lower boundary. This makes more sense to me as I would rather have padding before the scream to setup the context than after the scream.
Scream location: 13:55 seconds in Matriculated of The Animatrix