Accelerating montage play rate using time stretch curves.


I’ve been playing around with time stretch curves to modify the play rate of an animation montage. As weird as it seems to be, I’ve kind of got the grasp of it… To lower the play rate, then resetting it to 1.0 at specific points, though. But, how about if I wanted to accelerate the play rate? As long as I understand, having a 0.0 value on the curve means the play rate will be ignored and the montage will play with rate 1.0, but I need it to play with a rate greater than 1.0. How can I do that?

Thanks in advance.

Necroing this as I had to also accelerate Montages today, didn’t know how to do it and this result came up. Figured it out though:

To accelerate the Montage, set the Rate Scale in the Montage->Asset Details->Animation to be theaccelerated value you want, like 3.0.

Then add the MontageTimeStretchCurve and it will control how much of that Rate Scale is applied. Basically the curve acts as an alpha with values from 0.0 to 1.0:

When the curve is at 0.0, none of the Rate Scale is applied and the final playrate is the default of 1.0. When the curve is at 1.0, the full Rate Scale is applied making the final playrate 3.0.

My question would be how to apply both slowdown and speed up with the same curve? Unfortunately using negative values in the curve did not invert the effect.

I was using Unreal 4.25.?