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Convert light to keyframe?

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Matthew MinamyerConvert light to keyframe?
by on Jul 7, 2011 at 1:05:37 am

Has anyone heard of a way to create key-frames based on light value of footage. I have footage that strobes and I want to make a title that strobes as well.

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Walter SoykaRe: Convert light to keyframe?
by on Jul 7, 2011 at 1:18:43 am

You could use sampleImage() in an expression.

See Dan Ebberts's classic Obscuration Using sampleImage() example [link] for some inspiration.

Walter Soyka
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Paul RoperRe: Convert light to keyframe?
by on Jul 7, 2011 at 1:19:40 am

You can achieve this using the sampleimage expression. I'm no expressions expert but there are a few on this site. Just do a search for sampleimage and you'll hopefully find something useful.

It basically returns the RGB values of any point you specify. You can then link whatever value you like (position, rotation, amount of blur, brightness of lens flare - whatever) to this value.

Hope that helps (a bit!)

- Paul

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Matthew MinamyerRe: Convert light to keyframe?
by on Aug 2, 2011 at 1:06:16 am

That helps a lot! Thankyou both, I love this forum.

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