Forums > Jitter

many many cameras.

February 27, 2006 | 6:35 pm

Ciao,

I’ve got a request from a video artist.
She wants to connect 20 (twenty) cameras to record the same image at
same time from different perspectives.

Any chance to connect so many cameras to a comptuer?
Did someone already moved some step in this direction?

Thanks for any help!!

Nicola

Studio Arki snc
http://www.studioarki.com


February 27, 2006 | 7:23 pm

recording? she could put a tape in each camera and record with all of
them.

if she needs live video feeds in, she might consider using a matrix
router and/or a multiplexer. some video routers can even be
controlled by max via RS232 serial.


February 27, 2006 | 7:51 pm

I agree. I’ve written a patch that controls Knox video routers (serial
control), it will switch at 30fps, but you need to have all inputs
synchronized first, so you have to send the video through a TBC or
frame sync first. That’s alot of gear, and is pricey, but it works.
I’ve successfully switched between 8 cameras quickly, creating a
real-time bullet-time effect. Great for live shows.

http://en.wikipedia.org/wiki/Bullet_time

Brian Dressel


February 27, 2006 | 8:00 pm

> I’ve got a request from a video artist.
> She wants to connect 20 (twenty) cameras to record the same image
> at same time from different perspectives.
>
> Any chance to connect so many cameras to a comptuer?

no not really.

multiple computers with synchronized recording via ot/udp or netsend/
recieve would be one way.

multiple dv cameras with lanc remote control and then match up the
time code later (as jonathan mentions), perhaps something like 20 dvd-
recorders as the medium would be better.

or better, sync’able DVR’s which are also RS-232 controllable,
preferably eith central timecode generator to give each deck the same
timecode. check out:

http://ffv.com/

if one were to push IIDC to its ~theoretical~ limits, you might have
something like:
4 Firewire 400 PCI cards, each giving you a maximum of 3-4 unibrain
firei cameras per card, so a max total of 16 cameras on one computer
- it would be neat to composite all the different angles into one
tiled movie at high resolution. there is a good chance that the OS
or the PCI bus will not be happy about opening so many IIDC drivers
at once.

why twenty?

twenty three is a much better number ;)

oh one more thing:

there are ‘multiplexer’ devices and ‘multichannel dvr’s designed to
record many cameras at once in the surveillance industry
such as http://www.cctvdynamics.com/ — but watch out for limits on
the frame rate and resolution, because this security stuff often
lacks in this area. also look for how easy to export or transcode
the movies into something useful for an artist.

-deKam


February 27, 2006 | 11:14 pm

http://www.vrhotwires.com/InexpensivePanoramicVideo.html

this guy managed to get 6 fire-i board cameras working at the same
time on single computer. that sounds promising.

it seems he was using imac g4 for this, probably meaning that the
same setup could be working with mac mini.

that could be quite "cheap" way to get something like this working.

klif


February 28, 2006 | 10:29 am

20, or 23, or 53: many network camera’s (like the axis ones) could be a
solution.

I even think you could trigger those externally to take one frame and
have them upload it to your computer via ftp, each with their own
filename, neatly in the same directory

not very cheap either, and don’t know if you get up to pal
resolution….

much cheaper is to get a strip of film, put it in a tube, make a
pinhole per frame,
and expose: hundreds of sych frames in high resolution and soft focus..
(the first method used by tim mcmillan in the eighties)

ciao,

Joost.

——————————————-

Joost Rekveld
———– http://www.lumen.nu/rekveld

——————————————-

"The mystery of the world is the visible, not the invisible"
(Oscar Wilde)

——————————————-


March 1, 2006 | 12:30 pm

ANy experience with network cameras?

Good models? Prices?

And jitter object to control them?

N.


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