FX Filters that change with the sound of the clip at DVinfo.net

Chris Knight · November 3rd, 2007, 05:27 PM

So let's say I have a clip with a filter on it (contrast, threshold, whatever) I want an attribute of the filter to change according to the trend of the sound that accompanies the clip.

So if I have a clip of a man talking, If he isn't speaking, there is no effect, if he is whispering, there is a little effect, if he's yelling, the effect is very pronounced.

How can I make this happen? What software do I need? I have FCP and Motion. But I can get access to other things through my school if need be.

Carl Middleton · November 3rd, 2007, 05:32 PM

You may want to check out After Effects.

With the 'Turn Amplitude Into Keyframes' (I think it's called) setting, you get a number, I believe 0-1 or 0-100, of percentage of max volume. You can then tell any setting on any effect to use this value. For example, the sound clip of a flickering light (zzzt-zzzzt) could change the opacity of the video layer, giving the appearance of the light flickering, set by the noise.

C

Daniel Ross · November 3rd, 2007, 06:05 PM

Good advice, or, really, you could just look at the waveform and do the same thing by hand in any application. Might be a bit slow, but shouldn't be too hard.

Jon Jaschob · November 4th, 2007, 02:30 PM

Another good resource for AE.
http://www.videocopilot.net/tutorials.html
Although I would do it by hand if the clip wasn't too long, like over 10 minutes.

November 3rd, 2007, 05:27 PM	#1
Chris Knight Regular Crew Join Date: Sep 2006 Location: Hyde Park, New York Posts: 53	FX Filters that change with the sound of the clip So let's say I have a clip with a filter on it (contrast, threshold, whatever) I want an attribute of the filter to change according to the trend of the sound that accompanies the clip. So if I have a clip of a man talking, If he isn't speaking, there is no effect, if he is whispering, there is a little effect, if he's yelling, the effect is very pronounced. How can I make this happen? What software do I need? I have FCP and Motion. But I can get access to other things through my school if need be. __________________ Chris Knight Frame of Mind Productions http://www.fmpfilms.com

November 3rd, 2007, 05:32 PM	#2
Carl Middleton Major Player Join Date: Sep 2007 Location: Fernandina Beach, FL Posts: 562	You may want to check out After Effects. With the 'Turn Amplitude Into Keyframes' (I think it's called) setting, you get a number, I believe 0-1 or 0-100, of percentage of max volume. You can then tell any setting on any effect to use this value. For example, the sound clip of a flickering light (zzzt-zzzzt) could change the opacity of the video layer, giving the appearance of the light flickering, set by the noise. C

November 3rd, 2007, 06:05 PM	#3
Daniel Ross Major Player Join Date: Jul 2007 Location: Marin & Davis, CA, USA Posts: 418	Good advice, or, really, you could just look at the waveform and do the same thing by hand in any application. Might be a bit slow, but shouldn't be too hard.

November 4th, 2007, 02:30 PM	#4
Jon Jaschob Major Player Join Date: Oct 2005 Posts: 232	Another good resource for AE. http://www.videocopilot.net/tutorials.html Although I would do it by hand if the clip wasn't too long, like over 10 minutes.