Set duration from custom inspector

Hi!

I created a custom Playable to read an animation from a CSV file in a timeline. I would like to set the duration when the user chooses a file. I just don't know how to change the duration. If possible I would like to set the default duration of the clip directly because we often use the shortcut 'C' to resize the clip to its duration.



My custom clip has a duration field but it is not settable.



I am used to work with RecordClip that I create from a track from script (which I don't do here) and I can cast it to a TimelineClip which I can change the duration :

TimelineClip clip = RecorderTrack.CreateClip<RecorderClip>();

If only I could wast my CustomClip to a TimelineClip I think it would work but I can't.



Finally I don't know how to set the duration from the CustomInspector (in the OnInspectorGUI() function) if anyone could help me please!

EDIT : Anyone knows how to access the track of a clip from the clip? I need the track in the CustomEditor of my clip.