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Posted by nappy on 04/20/07 17:45
"EHSTC" <pilkington13@netzero.net> wrote in message
news:1177020450.933361.105080@b58g2000hsg.googlegroups.com...
> On Apr 18, 9:12 am, "blackbu...@aol.com" <blackbu...@aol.com> wrote:
>> On Apr 17, 7:03 pm, "nappy" <s...@spam.com> wrote:
>>
>>
>>
>>
>>
>> > 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.....
no
>
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