live key via labtop

[michi_vb]

helo.

does anybody know about a (software)possibilty to
generate “live chroma key” while greenscreen shooting .
ie via dv signal through firewire on my labtop (win.XP)
the purpose is not to generate the perfect key, since having monitoring control.
…kind of alternative to a video – mixer solution….

HD – cam > dv-walkman > labtop ( ie two layers :: 1.BG.mattepaint 2.live videosignal)

would be very helpful if anybody has an idea

[bnw]

If you are just checking the quality of the greenscreen, you could use Frischluft Lensfeed to take a live stream into AfterEffects: http://taronites.com/lensfeed/lensfeed.php. If you need to go out live as well I’d go for a hardware vision mixer if you can, to avoid latency and dropped frames, but you may be able to do something with one of the various VJ things around, probably Resolume or Pilgrim could do it.

[drive scorpion]

loops wrote:

If you are just checking the quality of the greenscreen, you could use Frischluft Lensfeed to take a live stream into AfterEffects: http://taronites.com/lensfeed/lensfeed.php. If you need to go out live as well I’d go for a hardware vision mixer if you can, to avoid latency and dropped frames, but you may be able to do something with one of the various VJ things around, probably Resolume or Pilgrim could do it.

thanks a lot … i dreamed of a tool that would work within one of my favourite animation/comp packages. to do some rough previews , this should work.
and you’ve got an acceptable keyer

…but…too bad
obvious limitations are indeed the delays and latency of the signal passing through: i saved a ram player at full pal-sd resolution , after effects recorded at an unsteady framerate around 12.5 fps, no matter if you change the ram players resolution…

[Kjell]

you would defintiely need to go with a dedicated harware solution to have realtime capabilities. i’ve used this box before to great success:

http://www.ultimatte.com/UltimatteMain/dv%20Main.html

i’ve taken the DV stream off an HDCAM camera to test lineups before shooting. you’d need an NTSC out of your laptop/PC that runs your bg plate into a cheap mixer (think Videoonics or Panasonic) to combine the signals.

the ultimatte box pulls much better keys than the crappy video mixers ever do, but it still is only as good as the source you’re working with

[Author]

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