I have designed some effects (with keyframes) to a specific clip, and I need to replicate those effects to other clips. However, the clips have different durations.
When I copy the effects to other clips, if the clip is shorter, the last keyframes disappear; if it is longer, the keyframes end too soon. So I have to adjust everything manually.

Is it possible to copy the effects while having the distance between keyframes proportional to the target clip duration?
Or stretch a clip in a way that the relative (not absolute) distances between keyframes are kept?