Does anyone have an knowledge of the exact rate of change used in the sliding stretch effect. I’m looking to slow down a video which is recorded to audio that has had the sliding stretch effect applied to it in Audacity. The tempo of the audio has a continuous rate of change and ends 4x faster than it started. In order to sync the video to audio played back at 1x speed (i.e. no tempo change), I would need to apply the inverse rate of change to the video (i.e. the video starts at 1x speed, and ends at 0.25 speed). Not having any luck with time-remapping in premiere pro so any suggestions on how to export or copy the sliding stretch effect into a video software would be appreciated.
The rate of change is linear.
As an example, if the original bpm is 100 and you apply Sliding Stretch starting at 0% (no stretch) and ending at 200% (4 x original tempo), the tempo at the mid-point of the stretched track will be 200 bpm (double speed).
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