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Revealing audio spectrum on path?
So I’ve tried every way I know to do this (write-on, linear wipe) and I can’t come up with a good way.
I’ve made a solid, made an “S” path on it and applied the Audio Spectrum filter. I would like to go down the path revealing the Audio Spectrum animation. Using the write-on filter doesn’t give me enough width (only goes to 50 pixels wide) and the linear wipe doesn’t follow the path. What I would love is something like the linear wipe that would follow the path, that way I could have some crossover from two sections of the path.
Any ideas?
Matthew Rogers
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1 Reply
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In your situation, this is what I’d do.
1. I’d create my audio spectrum effect on one layer.
– Make sure to add the path, and to tell the effect to place the spectrum on the path.
* for the sake of this tutorial, Don’t use a black solid – the color doesn’t matter, but it will be much easier to see things if you use a red one.2. Duplicate the layer
3. On the top layer, lets call it “the Matte Layer, ” delete the audio effect, but keep the path.
4. Then add the stroke effect to the matte layer, and tell it to use the path for the stroke.
5. The stroke effect can be easily animated using the start and end properties. Try animating the end to go from 0 to 100 over the length of time you want to reveal your audio spectrum.
6. Expand the stroke effect to as large as it goes (brush size) whichis going to be just as large as the write on effect – it’s also limited to 50.
7. Set the hardness to 100, to get rid of the fuzzy edges.
8. Set the stroke effect’s paint style to “reveal original image.”
9. Expand the stroke:
If you are in AE 7 or below:
– Use the simple choker effect, but choke the matte into the negative values – as you’ll see, it will expand the stroke size. You can expand as far as -100.
If this is still too thin, add another simple choker effect on top of it.
In AE CS3, add the photoshop layer style called Stroke to your solid with the stroke effect. You can use it to expand the stroke effect much further than the simple choker.
10. In the track Mattes Column (timeline) tell the bottom layer to use the layer above it as an alpha matte.
There you go.
Aharon Rabinowitz
Email: arabinowitz (AT) yahoo (DOT) com
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