Radom jump cuts to audio

[Dan Ebberts]

Play with this time remapping expression. Set threshold to something that makes sense for your audio level and set beatDur to the approximate maximum duration of one beat (this is used to make sure the expression doesn’t jump too close to the clip’s Out Point).


threshold = 25.0;
beatDur = 1;

audioLev = thisComp.layer("Audio Amplitude").effect("Both Channels")("Slider");

above = false;
frame = timeToFrames();
while (frame >= timeToFrames(inPoint)){
t = framesToTime(frame);
if (above){
if (audioLev.valueAtTime(t) < threshold){
frame++;
break;
}
}else if (audioLev.valueAtTime(t) >= threshold){
above = true;
}
frame--;
}
if (! above){
t = time - inPoint;
}else{
t = time - framesToTime(frame);
}
seedRandom(frame,true);
start = random(inPoint,outPoint-beatDur);
start + t;


Dan

[Jean Piche]

Dear Dan,

Many thanks for this script that does exactly what I need to do. You are definitely the champion of AE scripting.

I do program quite a bit myself but, for some reason, I seem to have a serious JavaScript blockage. Perhaps it is the difficulty of passing variable values from one evaluation to the next…

In any case, many many thanks. I will spending tomorrow trying to figure out how you did this!

[Sébastien François]

I confirm, this script does what I was looking for for a while! Thanx Dan, I use your expressions very often.