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Retime to different music clips with same main 4 bars, but different bpm, intro / outro times

Community Beginner ,
Oct 26, 2020

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I have a template for a 15 second or so video meme that I would like to swap out different music for regularly, and retime the entire animation to it as quickly as possible.

I see in general how to stretch / compress animation, but I have a few considerations I've yet to work out:

 

1)  Much of the animation is nested (within various precomps), so I can't lassoo it all at once.

 

2)  While each incarnation will have a main 4 bar section, the bpm will vary, and the intro / outro times will vary by a few beats, so what I'd really like to do is set markers for the beginning and end points of the 4 bar section, then when I import new music, mark the corresponding main section start and end points, then take ALL of the existing animation, and stretch / compress it such that those two points are now locked to the corresponding 2 points in the new music... which should then automatically mean that even the keyframes before and after the two main points are now adjusted to the new bpm.

 

If I just grab the whole thing and compress/stretch it, those two points will move, and it becomes a constant guessing game about microshifting to try to get them to line up, so is there some way to time-stretch the entire comp and all nested precomps similar to what I'm describing?  (Or any other method that achieves a similar end?

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Retime to different music clips with same main 4 bars, but different bpm, intro / outro times

Community Beginner ,
Oct 26, 2020

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I have a template for a 15 second or so video meme that I would like to swap out different music for regularly, and retime the entire animation to it as quickly as possible.

I see in general how to stretch / compress animation, but I have a few considerations I've yet to work out:

 

1)  Much of the animation is nested (within various precomps), so I can't lassoo it all at once.

 

2)  While each incarnation will have a main 4 bar section, the bpm will vary, and the intro / outro times will vary by a few beats, so what I'd really like to do is set markers for the beginning and end points of the 4 bar section, then when I import new music, mark the corresponding main section start and end points, then take ALL of the existing animation, and stretch / compress it such that those two points are now locked to the corresponding 2 points in the new music... which should then automatically mean that even the keyframes before and after the two main points are now adjusted to the new bpm.

 

If I just grab the whole thing and compress/stretch it, those two points will move, and it becomes a constant guessing game about microshifting to try to get them to line up, so is there some way to time-stretch the entire comp and all nested precomps similar to what I'm describing?  (Or any other method that achieves a similar end?

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Oct 26, 2020 0
Mylenium LATEST
Most Valuable Participant ,
Oct 26, 2020

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Pre-compose, apply time-remapping. Done. Split the layer where necessary to avoid messing things up with too many keyframes.

 

Mylenium

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