[UPROPERTY](Programming/UnrealArchitecture/Reference/Properties)(VisibleAnywhere, Category=GeometryCache)
float Duration
The duration of this track's animation. This is an open ended interval [0..Duration[. If the animation is looping this is also the length of the loop.
This is set by the importer possibly based on user preferences. There may be less actual frames available. E.g. the animation has data for the first 2 seconds, but duration is set to 5, so it will loop every 5 seconds with the last three seconds showing a static scene.