video shakes to the beat?

Is it possible ... to use an audio track to make your video shake (or follow the audio). Rather than manually adding keyframes, etc. My client wants the video to shake, to the beat.

Thanks in advance, Jess

Or use animation>keyframe assistants>convert audio to keyframes?

For shaking/movement to particular elements of the music (the bassline for instance) you'd be better having separate audio tracks and syncing them up and using the ones you want.

*AE 5.5 Pro - *PS CS1 - *Combustion 3
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Here's a simple tut from Adobe on tying Audio to Size:

http://studio.adobe.com/us/tips/tip.jsp?p=1&xml=aft6audio&id=396#

The tut is nice because it tells you how to tweak the expression to get the sizes you want. The same principal works for position, see expressions below.

Audio moves both x and y

ak = thisComp.layer("Audio Amplitude").effect("Both Channels")("Slider")
value + [ak, ak]


audio moves y only

ak = thisComp.layer("Audio Amplitude").effect("Both Channels")("Slider")
value + [0, ak]

Audio moves x only

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

value + [ak, 0]

If you want the layer to get slightly larger with the beat, use the "value +" as above, expression for Scale follows:


ak = thisComp.layer("Audio Amplitude").effect("Both Channels")("Slider")
value +[ak, ak]


That first line that defines "ak" above is just what you get when you pickwhip to the Both Sliders in the Audio Keyframe layer as in the tut.

I'd second that. Soundkeys will allow you to isolate specific frequencies, say a kick drum hit and keyframe those points, you then build expression to tie it to whatever value you want changed. Takes a lot of the guess work and frustration out of it...

Erik