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adding frames – light streaks?

April 29, 2007 | 4:51 am

Greetings all

I am trying to figure out how to create an effect where essentially I add frames together –

that is to say I want to use a live camera feed to shoot a moving LED in the dark and end up with long traces from the path of the light source…
I looked at some delays and feedback but it’s not really what I am looking for…
you can get something like this effect by using a DV cam with controllable frame rate – 4fps will make this show up a bit…

an suggestions about how to do this?

thanks
jamie


April 29, 2007 | 6:45 am

jitter has many ready objects to do this.
one tip is if you choose to use jit.slide, turn your matrix into float32
before the slide, the float32 precision will give you a longer trail, yes.
[jit.matrix 1 float32 320 240 @adapt 0] > [jit.slide @slide_up 10
@slide_down 500]
i haven’t tested this but see if you get something

On 4/29/07, jamie jewett wrote:
>
> Greetings all
>
> I am trying to figure out how to create an effect where essentially I add
> frames together -
>
> that is to say I want to use a live camera feed to shoot a moving LED in
> the dark and end up with long traces from the path of the light source…
> I looked at some delays and feedback but it’s not really what I am looking
> for…
> you can get something like this effect by using a DV cam with controllable
> frame rate – 4fps will make this show up a bit…
>
> an suggestions about how to do this?
>
> thanks
> jamie
>
>
>


April 29, 2007 | 6:53 pm

BEAUTIFUL!
wow – that was the easiest thing I’ve done in jitter in a long time
thanks so much for responding
best
jamie

—– Original Message —-
From: yair reshef
Sent: Sunday, April 29, 2007 2:45:23 AM
Subject: Re: [jitter] adding frames – light streaks?

jitter has many ready objects to do this.
one tip is if you choose to use jit.slide, turn your matrix into float32 before the slide, the float32 precision will give you a longer trail, yes.
[jit.matrix 1 float32 320 240 @adapt 0] > [
jit.slide @slide_up 10 @slide_down 500]
i haven’t tested this but see if you get something

On 4/29/07, jamie jewett <
jewett18@yahoo.com> wrote:
Greetings all

I am trying to figure out how to create an effect where essentially I add frames together –

that is to say I want to use a live camera feed to shoot a moving LED in the dark and end up with long traces from the path of the light source…

I looked at some delays and feedback but it’s not really what I am looking for…
you can get something like this effect by using a DV cam with controllable frame rate – 4fps will make this show up a bit…

an suggestions about how to do this?

thanks
jamie


April 30, 2007 | 3:38 am

Helo jamie,
this is marlon.
There are several ways to do what you are trying to do.
One very succesfull is this one posted by a VJ friend Dan Winkler here.
http://danwinckler.com/blog/archives/2005/10/26/brush_01_a_tool_for_visual_performers/
have fun,
Marlon


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