-
Typewriter Expression
Hey expression gurus,
I’ve got a project that has a lot of typing on screen with a typewrite sound effect. It’s a very tedious job making the sound effect match the screen animation so I decided to try this out with an expression to do the work for me.
Here’s what I’ve done so far:
I made a text layer, typed some text and added the typewriter animation preset which gives me the range selector of 0 – 100 percent for the text to type on.
I added my typewriter sound effect and converted audio to keyframes.
I then added an expression to that keyframe layer so that the keyframe will show either 100 or 0 depending on if there is a click sound effect at that moment. That expression was:
x=linear(value, 0, 10, 0, 100)
if (x>30) 100
else 0then I pickwhiped the text layer’s range selection to the audio keyframe and at this point the text will be either 0% or 100%, making the text on and off when the sound effect is heard.
So I”m almost there…now I just need it so that it actually counts each 100% ‘click’ to make the range count from 0% to 1% to 2% and so on. I need an expression that would sort of look like the following, except in an actual expression form:
x=thisComp.layer(“Audio Amplitude”).effect(“Both Channels”)(“Slider”)
if (x=100) add 1 to value
else keep last valueAny ideas? Thanks!
-
4 Replies
-
Expression results don’t survive from one frame to the next, so at each frame, you have to loop through previous frames to figure out what’s happened in the past. It sounds like you need a variation of this beat counter:
https://www.motionscript.com/design-guide/audio-count.html
Just set the threshold to your value (100?) and multiply “n” by the appropriate scale factor. That should do it.
Dan
-
That did it thanks!
-
hi
i am not familiar with using expressions in after effects..
could you please send me the .aep file
or explain in a little detail how exactly to attain the effect along with sound
thanks -
Hey did you ever find a way for this to work??
Reply to this Discussion! Login or Sign Up