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Posted by EHSTC on 04/19/07 22:07
On Apr 18, 9:12 am, "blackbu...@aol.com" <blackbu...@aol.com> wrote:
> On Apr 17, 7:03 pm, "nappy" <s...@spam.com> wrote:
>
>
>
>
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> > There isn't an absolute lighting value for Greenscreen.
>
> > Make sure your greenscreen is lit well and evenly and most importantly move
> > your talent far enough away to minimize spill.
>
> > If you only have a small greenscreen then you have to play witht the light
> > levels and the talent distance to minimize spill.
>
> > "Larry in AZ" <usen...@DE.LETE.THISljvideo.com> wrote in messagenews:Xns99159C062189thefrogprince@69.28.173.184...
>
> > > Waiving the right to remain silent, "GeekBoy" <n...@nerdy.com> said:
>
> > >> "EHSTC" <pilkingto...@netzero.net> wrote in message
> > >>news:1176843245.443261.165350@p77g2000hsh.googlegroups.com...
> > >>> Hey all,
>
> > >>> My high school TV studio has a green screen, and we have got it to
> > >>> work, but I get loads of "sparkles" on my subject. Ive looked into
> > >>> this online, and found that it is cuz of spill from over lighting at
> > >>> that the screen luminisity or something should be at 40-50
> > >>> IRE........WHAT IS IRE, and how do i measure that?
>
> > >> Institute of Radio Engineers; IREs are units of measurement dividing the
> > >> area from the bottom of sync to peak white level into 140 equal units.
> > >> 140 IRE = 1VP-P
>
> > >> Using a vector or wave scope which is a lot more money than maybe the
> > >> school is willing to spend. Unless they arelready have a scope.
> > >> Some editing software has these on them to measure.
>
> > > Or, make the lighting on the green screen about half that on the talent.
> > > Amounts to about the same thing, or close enough...
>
> > > --
> > > Larry Jandro
> > > Video Engineering & Equipment Rentals
> > > Scottsdale, Arizona, USA
> > > [Remove spamtrap in ALLCAPS to reply]- Hide quoted text -
>
> > - Show quoted text -
>
> There are two kinds of spill that screw-up greenscreen:
>
> 1) Talent shadows on the green background. Move them far enough out so
> that shadows fall below the frame.
>
> 2) Green reflecting back onto the edges of your talent. Again, move
> them as far out as possible, and back-light your talent to get a good
> clip.- Hide quoted text -
>
> - Show quoted text -
Thanks guys, ill try this tomorrow. Just a question on the Final Cut,
can I run live feed thru Final Cut?? if so, how? I know it sounds
stupid.....
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