Uniform Scale Wiggle : Adobe After Effects Expressions
If you have reached this tutorial it means that you are struggling to apply the same amount of scale to both width and height using a wiggle expression.
No problem, this 1 minute tutorial will clarify once for all why it doesn't work using a normal wiggle expression, and what changes you need to make in order to make it work.
Basically Scale wants 2 values (x and y), but if you feed it with a normal wiggle expression, it would read 1 random value for x and one random value for y.
So write the following expression:
w = wiggle(5,30);
[w[0],w[0]]
So that you impose the same value for x (or zero) to be applied to y.
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