Interrelation of durations for clips and transitions.

[sjc57]

Can somebody please indicate how the duration of the transition relates to the duration of the clip. I can't find it documented. I created a video from 3 clips of 60s duration the first two specifying a transition of duration 2s. What is the expected length of the clip?

If the transition was part of the duration of the clip then I would expect 180s. If the transition was in addition to the length of the clip then 184 seconds. Problem is that the length of the video is actually 176s.

How does this work?