Jitter in live performance

Jan 10, 2007 at 10:43pm

Jitter in live performance

I am putting on a show where I am creating live visuals using a macbook pro. I would like to switch between a few patches of jitter during the course of the show but I don’t want any of this “seen” Can anyone with experience give some tips on seamless presentation? I imagine that specifying a window coordinate and border 0 on the extra monitor (through the dvi out) is the answer. Problem is I only get access to the specific projector in the show on the day- and I am concerned that I am setting window size and properties correctly. A smooth (fade to black) transition from one patch to another seems like a headache- am I looking at getting a video jockey to mix the output of the laptop live to keep it all risk-averse?

TIA!

#29604
Jan 11, 2007 at 9:10am

#92970
Jan 11, 2007 at 12:00pm

Thanks Jean-Francois for your help-
Back to the books-it’s gonna be a looong month!

#92971
Jan 12, 2007 at 9:56pm

What do you want to switch between? The patch interface itself or the output window? I did several lessons/seminars where I needed to switch between the 2d output of two different patches. I put them both on a videoplane in 3d and made the camera move from one plane to another. Really didn’t take more than an hour to make (I’m not a jitter expert) and every time afterwards ppl come to me and ask which transition mode of powerpoint I use. If you want I can send you the patch.

Mattijs

#92972
Jan 12, 2007 at 10:18pm

Thanks Mattijs,
I was meaning the output window.
That sounds like a great transition idea.
If you could post it up here that would be really helpful!
Cheers,

mm

#92973
Jan 13, 2007 at 10:19am

Here it is.

As I said, I made it in an hour time, I didn’t take much time to align the patchcords ;)

Btw, now that I open it (not on the powerbook that I used for the seminars) everything still works but I get a stream of error messages:

jit.gl.texture: setting compare mode.: GL Error: Invalid enumeration
jit.gl.texture: setting compare func.: GL Error: Invalid enumeration
jit.gl.texture: setting texture mode.: GL Error: Invalid enumeration

I’m on a low-spec pc right now, perhaps this problem doesn’t occur with other setups.

Cheers,
Mattijs

#92974
Jan 14, 2007 at 11:19pm

Many thanks Mattijs, much appreciated!

#92975
Jan 15, 2007 at 12:17am

I think this was addressed in J1.6.3b3. Check the changelog to be sure though.

wes

On 1/13/07, Mattijs Kneppers wrote:
> Here it is.
>
> As I said, I made it in an hour time, I didn’t take much time to align the patchcords ;)
>
> Btw, now that I open it (not on the powerbook that I used for the seminars) everything still works but I get a stream of error messages:
>
> jit.gl.texture: setting compare mode.: GL Error: Invalid enumeration
> jit.gl.texture: setting compare func.: GL Error: Invalid enumeration
> jit.gl.texture: setting texture mode.: GL Error: Invalid enumeration
>
>
> I’m on a low-spec pc right now, perhaps this problem doesn’t occur with other setups.
>
> Cheers,
> Mattijs
> –
> SmadSteck – http://www.smadsteck.nl
> Interactive audiovisual sampling soft- and hardware
>
>
>
>
>
>
>

#92976
Jan 15, 2007 at 10:25am

Quote: wesley.hoke@gmail.com wrote on Mon, 15 January 2007 01:17
—————————————————-
> I think this was addressed in J1.6.3b3. Check the changelog to be sure though.
>
> wes

b3? Sure you don’t mean 2?

I will check in 1.6.3b2 on my windows computer. On mac there is no problem.

Mattijs

#92977
Jan 15, 2007 at 5:58pm

You’re right it is 1.6.3b2. If your graphics card supports the
GL_ARB_shadow extension, then you shouldn’t be seeing these errors.
In the code, we check this extension before setting the values of the
parameters that are giving you errors. I don’t have a low-spec
computer handy right now, so if you could possibly download GLEW
(http://glew.sourceforge.net/) and the run glewinfo binary, you can
check if your grahpics card has this extension or not. On windows,
there’s a binary so you don’t have to compile it.

wes

On 1/15/07, Mattijs Kneppers wrote:
>
> Quote: wesley.hoke@gmail.com wrote on Mon, 15 January 2007 01:17
> —————————————————-
> > I think this was addressed in J1.6.3b3. Check the changelog to be sure though.
> >
> > wes
>
> b3? Sure you don’t mean 2?
>
> I will check in 1.6.3b2 on my windows computer. On mac there is no problem.
>
> Mattijs
> –
> SmadSteck – http://www.smadsteck.nl
> Interactive audiovisual sampling soft- and hardware
>
>

#92978
Jan 15, 2007 at 7:00pm

Quote: wesley.hoke@gmail.com wrote on Mon, 15 January 2007 18:58
—————————————————-
> You’re right it is 1.6.3b2. If your graphics card supports the
> GL_ARB_shadow extension, then you shouldn’t be seeing these errors.
> In the code, we check this extension before setting the values of the
> parameters that are giving you errors. I don’t have a low-spec
> computer handy right now, so if you could possibly download GLEW
> (http://glew.sourceforge.net/) and the run glewinfo binary, you can
> check if your grahpics card has this extension or not. On windows,
> there’s a binary so you don’t have to compile it.
>
> wes

Hey, these are cool apps.

You’re right, the GL_ARB_shadow extension is missing. Time for a new gfx card on this oldie :)

Dling 1.6.3b2…

Thanks,
mattijs

#92979

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