How to regsiter a callback function,to make it called after a animation clip is finished?

I've imported a FBX skinmesh with many animations .When I played one animation,I hope I can register a callback function when the animation is finished,so I can easily do animation changes.

But I cannot add animation event to these imported skinmesh animation clip.In animation plane , these clips are read only. Can anyone help me , thank you very much.

You need to duplicate your clips and then add events. Which is not very convenient, because clips are not imported from file any more. Alternative is automating the process and adding callbacks like that in the AssetPostprocessor.