[Dan Ebberts]

Something like this maybe:

dur = 1.0;
val = value;
if (numKeys > 0){
  n = nearestKey(time).index;
  if (time > key(n).time) n++;
  if (n <= numKeys){
    v1 = n == 1 ? valueAtTime(0) : key(n-1).value;
    v2 = key(n).value;
    t1 = key(n).time-dur;
    t2 = key(n).time;
    val = ease(time,t1,t2,v1,v2);
  }else{
    val = key(numKeys).value;
  }
}
val

[Dan Ebberts]

If you have the images in a sequence, one image per frame, then you could use a time remapping expression to control which frame is displayed based on some calculation for which page is currently flipping. Then you could, for example, use layer markers to advance to the next frame/page with a time remapping expression like this:

m = marker;
n = 0;
if (m.numKeys > 0){
  n = m.nearestKey(time).index;
  if (time < m.key(n).time) n--;
}
framesToTime(n)

[Dan Ebberts]

I see a couple of things. This line:

if (CurrentKeyframe.index = 1) {

needs to be like this:

if (CurrentKeyframe.index == 1) {

Also, your code doesn’t quite work if there are no keyframes (or only one keyframe) or if the first keyframe might be later than time = 0. I think something like this should work for what you’re trying to do:

val = value;
if (numKeys > 1){
  n = nearestKey(time).index;
  if (time < key(n).time) n--;
  if (n == 1){
    t1 = key(1).time;
    t2 = key(2).time;
    v1 = key(1).value;
    v2 = key(2).value;
    val = ease(time,t1,t2,v1,v2);
  }
}
val

[Dan Ebberts]

I haven’t tested this, but I think you’d want to structure it more like this:

val = "No Match";
for (var k=0; k<21; k++){
  if(footage("daily-by-location.json").dataValue([1,k,8])=="618f344d1cb3e06d152fd4b3″){
    val = footage("daily-by-location.json").dataValue([1,k,4]);
    break;
  }
}
val

[Dan Ebberts]

I think what you want is the “offset” flavor of loopOut(). You probably only need the first 3 keyframes:

loopOut("offset")

[Dan Ebberts]

There are some situations where you might need a different approach. For example, if the y position of the 1st and 2nd keyframes are the same (and maybe the y value goes above and/or below the keyframe value in between). In that case you might want to proportion the y offset, based on how far along you are between the two keyframes, like this:

dropMenu = effect("Dropdown Menu Control")("Menu");
myListe = [195.7, 258.2, 320.7, 445.7, 508.2, 570.7, 633.2, 695.7, 758.2, 820.7, 883.2];
myPlace = myListe[dropMenu - 1];
t1 = key(1).time;
t2 = key(2).time;
yOffset = linear(time,t1,t2,0,myPlace)
value + [0,yOffset]

[Dan Ebberts]

The nested comp with offset start time stuff is always tricky, but it will probably look something like this:

C = comp("Main");
L1 = C.layer("Null 1");
L2 = C.layer(thisComp.name);
L2.fromComp(L1.toComp(L1.anchorPoint,time+L2.startTime));

[Dan Ebberts]

I guess that would look like this:

tStep = framesToTime(10);
tPause = framesToTime(10);
tStart = framesToTime(10);
tStop = framesToTime(300);
jumpY = -200;
t = Math.min(Math.max(time - tStart,0),tStop);
nSteps = Math.floor(t/(tStep+tPause));
phase = t-((tStep+tPause)*nSteps);
e = linear(phase,0,tStep,0,jumpY);
value + [0,nSteps*jumpY + e]

[Dan Ebberts]

Not fully tested, but maybe something like this:

beat = 5; // which beat to trigger on
threshold = 20.0;
audioLev = thisComp.layer("soundKeys Average").effect("Sound Keys")("Output 1");
above = false;
fCur = timeToFrames(time);
f = 0
fSave = [];
n = 0;
while (f <= fCur){
  t = framesToTime(f);
  if (above){
    if (audioLev.valueAtTime(t) < threshold){
      above = false;
    }
  }else if (audioLev.valueAtTime(t) >= threshold){
    above = true;
    n++;
    fSave.push(f);
  }
  f++;
}
(n >= beat) ? time - framesToTime(fSave[beat-1]) : 0

[Dan Ebberts]

Like this (adjust tStart to set start frame):

tStep = framesToTime(10);
tPause = framesToTime(10);
tStart = framesToTime(10);
tStop = framesToTime(300);
jumpX = -200;
t = Math.min(Math.max(time - tStart,0),tStop);
nSteps = Math.floor(t/(tStep+tPause));
phase = t-((tStep+tPause)*nSteps);
e = linear(phase,0,tStep,0,jumpX);
value + [nSteps*jumpX + e,0]