How to make Speedramp effect using extendscript?

[Filip Vandueren]

Try this:

comp = app.project.activeItem;
var layer = comp.layer(1);
layer.timeRemapEnabled = true;
var timeRemapProp = layer.property("ADBE Time Remapping");
var ease = new KeyframeEase(0, 97);
var noEase = new KeyframeEase(0, 0.1);
timeRemapProp.setTemporalEaseAtKey(1,[noEase],[ease]);
timeRemapProp.setTemporalEaseAtKey(2,[ease],[noEase]);

[Dmitriy Samosenko]

Thanks, works, but speeding up should be in center of video and video should start with normal speed. (Video length should be decreased)

[Dmitriy Samosenko]

Need to achieve this))

[Filip Vandueren]

I didn’t watch the whole video, but this is exactly what they did at the timestamp you linked…

How would the script know how much shorter you want the video to be ?

[Dmitriy Samosenko]

Hmm, image is not attaching…

Here’s video:

https://www.dropbox.com/s/i73spb34xzjwr58/21%20x.mp4?dl=0

Speed graph:

http://files.dangerd.org/pub/!PUBLIC/ssssssssssssss.jpg

[Filip Vandueren]

The script needs to know how long that transition should be, exactly where it should occur, how much faster you want the motion to ramp up to…

It’s definitely easier to do it by eye and hand, unless you have dozens of these to automate.

[Filip Vandueren]

Here’s an update:

speedRampLength = 2; // create a speedRamp over 2 seconds
speedRampSkip= 12; // at the end of the 2sec speedramp, 12 seconds have been skipped.
speedRampTension = 80; // how much easeOut (0.1-100)

comp = app.project.activeItem;
var myLayer = comp.layer(1);
duration = myLayer.outPoint-myLayer.inPoint;
// sanity checks
speedRampSkip = Math.min(speedRampSkip, duration);
speedRampLength = Math.min(speedRampLength, duration-speedRampLength);

myLayer.timeRemapEnabled = true;
var timeRemapProp = myLayer.property("ADBE Time Remapping");
// remove lastKeyframe
timeRemapProp.removeKey(2)
// add new keyframes:
timeRemapProp.setValuesAtTimes([
    myLayer.inPoint+ (duration - speedRampSkip)/2,
    myLayer.inPoint+ (duration - speedRampSkip)/2 + speedRampLength,
    myLayer.inPoint+ (duration - speedRampSkip + speedRampLength)
], [
    (duration - speedRampSkip)/2,
    (duration - speedRampSkip)/2 + speedRampSkip,
    duration
])
myLayer.outPoint = myLayer.inPoint+ (duration - speedRampSkip + speedRampLength);
var ease = new KeyframeEase(1, speedRampTension);
var noEase = new KeyframeEase(1, 0.1);
timeRemapProp.setTemporalEaseAtKey(2,[noEase],[ease]);
timeRemapProp.setTemporalEaseAtKey(3,[ease],[noEase]);

[Dmitriy Samosenko]

Thank you so much, that helmp, i need to buy you a beer =)

We have around 40-50 videos to process every day, currently we’re using MLT framework for that purpose, but it’s very limited, so i’m moving now to after effects so videos will be processed without user interaction at all.