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Fade audio in/out based on layer’s in/out points
Can’t seem to find anything on this. I use my layer opacity fade script but can’t apply it to audio. Gives me an error that it must be a dimension of 2, not 1. But the output is a single value isnt it? Here’s what I typically use below for opacity that I want to adapt to audio as well:
transition = effect("Transition Duration")("Slider"); // transition time in frames
if (marker.numKeys<2){
tSecs = transition / ( 1 / thisComp.frameDuration); // convert to seconds
linear(time, inPoint, inPoint + tSecs, 0, 100) - linear(time, outPoint - tSecs, outPoint, 0, 100)
}else{
linear(time, inPoint, marker.key(1).time, 0, 100) - linear(time, marker.key(2).time, outPoint, 0, 100)
} -
4 Replies
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Something like this maybe:
transition = 2;
minVal = [-48,-48];
maxVal = [0,0];
if (time < (inPoint+outPoint)/2){
linear(time,inPoint,inPoint+transition,minVal,maxVal);
}else{
linear(time,outPoint-transition,outPoint,maxVal,minVal);
}
Dan
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Thanks Dan. Thats what i’m looking for. I modified it slightly though to not use seconds but frames. The modification I made seems to work only briefly. Once I scrub through the timeline, the expression throws a warning:
“Property or method “tSecs” in class “global” is missing or does not exist.”
here’s my mod to your code below. Error happens on line 8, but i can’t figure out why:
transition = effect("Transition Duration")("Slider"); // transition time in frames
minVal = [-48,-48];
maxVal = [0,0];
if (time < (inPoint+outPoint)/2){
tSecs = transition/(1/thisComp.frameDuration);
linear(time,inPoint,inPoint+tSecs,minVal,maxVal);
}else{
linear(time,outPoint-tSecs,outPoint,maxVal,minVal);
}
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I think you just need to move your tSecs definition above the if statement (otherwise it’s not defined when you get into the else clause).
Dan
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Yup! That was the issue. Thanks again Dan for your help. I really appreciate your continued efforts here.
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