Crop does not work with key frames

Question

I have a strange problem with my project:

I want to keyframe the scaling of a video like this 50% -> 55% -> 50% in order to crop out something for a moment.

When I change the scaling without the keyframes, it works - But as soon as I keyframe it, the crop does not show in the preview.

Any ideas on what might be broken here?

moritzell · Accepted Answer

Thank you for posting that so quickly. This is why screenshots and screen recordings are so helpful. You have a bunch of Time Remapping keyframes on your clip. The Time Remapping effects is happening after the scale, so the Scale keyframes are based on the original time of the clip, but the Time Remapping is happening after that and causing your scale to occur at a different time than where you want it to. If you don't want to nest your clip then do the Scale changes there, you can add the Transform effect on your clip. Animation the Scale parameter there, then you should be good.

I suspected something like this but what confuses me is, that the time remapping keyframes in the editing window are in sync with my scale keyframes.

Is there no way to find out where my scale keyframes get applied in the end? Being able to edit something on a timeline in the editing tab that does not translate to said timeline in the end is not very intuitive if you ask me.

Plus: The Transform effect behaves exactly the same.

It is a bit sad to know that nested sequences destroy transitions completely, because they would be the only alternative in theory.

I found a workaround that is just as unintuitive but it works: I just put the crop transform effect onto the master clip. Pretty wonky way to do it, but it works.

Edit: What I really dislike, is, that PP just sh*ts itself as soon as anything gets done to the replay speed. Be it time remapping, interpret footage or the plain "speed/duration" tab.

Already noticed that in the past when working with 50p footage that got slowed (via the speed/duration option) to 50%/25p. As soon as I wanted to apply the ProDAD Mercalli stabilizer, everything just broke, because the effect does not work based on the final speed / framerate / duration of the clip which it should. Using a nested sequence is mostly unusable as well, because you cannot apply transitions to it.

I am pretty mad because I often work with slow motion and sometimes clips still need to get stabilized a little and I have yet to find a way to do that.

In this case, it happens again, just with the difference that I used time remapping to speed up some sequences.

David Arbor · Answer

Can you please post screenshots, or even better, a screen recording showing this happening? I'm not sure what you're trying to do. You say you're going from 50%>55%, but that doesn't tell us if that clip is currently filling the frame because it's larger than your sequence size or if you're doing a picture-in-picture effect. You say crop, but are you using the Crop effect, a mask, or do you just mean that you want it to scale outside the sequence frame and that's the crop? Please be more specific.

It sounds like your clip might be filling the frame at 50%, and you want to temporarily zoom in to hide something, but when you add the keyframes the zoom doesn't happen?

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