The Strobe behavior simulates the look of a strobe light or lower-frame-rate video by holding a number of frames as defined by the Strobe Duration parameter over the playback of the clip. For example, when Strobe Duration is set to 10, frame 1 is held for 10 frames, frame 11 for 10 frames, frame 21 for 10 frames, and so on. The frames in between (2–10, 12–20, 22–30, and so on) do not appear.
Adjust this behavior using the control in the Behaviors Inspector:
Strobe Duration: A slider that sets the number of frames to hold. A value of 1 plays the clip at normal speed. The default value is 5 frames.