Green Screen
- Thread starter ftroop
- Start date
Flintstone
Well-known member
Re: Green Screen
As you said, the green screen must be well lit, and as uniformly possible. Your subject needs to be a certain distance from the green screen to avoid green light spill. Good lighting, of course is key (pun intended). You need your basic lighting kit: key, fill and backlight. Backlight being the most important one, because it will better "isolate" your subject from the background and also remove any minor spill bouncing off from the green screen.
Experimentation and practice is important. Most importantly, match your lighting with your intended keyed background.
Once you capture your footage in your computer, depending on your keying software, try upscalling your footage to 4:2:2 (instead of keeping it at DV 4:1:1), or better yet at 4:4:4, you will get better results. I personally use Matrox RTX100 Xtreme, and it upscalles to 4:4:4 automatically when I'm keying. Of course being Matrox/Premiere combo, it doesn't support 24p. :'( But I intend to remedy that soon.
As you said, the green screen must be well lit, and as uniformly possible. Your subject needs to be a certain distance from the green screen to avoid green light spill. Good lighting, of course is key (pun intended). You need your basic lighting kit: key, fill and backlight. Backlight being the most important one, because it will better "isolate" your subject from the background and also remove any minor spill bouncing off from the green screen.
Experimentation and practice is important. Most importantly, match your lighting with your intended keyed background.
Once you capture your footage in your computer, depending on your keying software, try upscalling your footage to 4:2:2 (instead of keeping it at DV 4:1:1), or better yet at 4:4:4, you will get better results. I personally use Matrox RTX100 Xtreme, and it upscalles to 4:4:4 automatically when I'm keying. Of course being Matrox/Premiere combo, it doesn't support 24p. :'( But I intend to remedy that soon.
Re: Green Screen
If you have your detail up, it'll create false edges that will look artificial against a screened background and will be hard to get rid of. With detail below -4 you start losing data due to the way charges in the CCD work (or so I've read). -4 is the ideal setting usually, but it's too soft for my tastes so I normally run -2. But when I green screen, I bump it back down to -4 to make sure I don't get any false edges.
If you have your detail up, it'll create false edges that will look artificial against a screened background and will be hard to get rid of. With detail below -4 you start losing data due to the way charges in the CCD work (or so I've read). -4 is the ideal setting usually, but it's too soft for my tastes so I normally run -2. But when I green screen, I bump it back down to -4 to make sure I don't get any false edges.
DVX100Shooter
Veteran
Re: Green Screen
what are some cool plug in's to use for the background once the green has been removed?
what are some cool plug in's to use for the background once the green has been removed?
Reidwriter
Member
Re: Green Screen
Try and keep your subject as far from the background while still being well lit etc...
It's really just practice and getting a feel for it.
I've had decent results, but not breathtaking. I just need to spend the time and practice.
Try and keep your subject as far from the background while still being well lit etc...
It's really just practice and getting a feel for it.
I've had decent results, but not breathtaking. I just need to spend the time and practice.
Turbulence
New member
Re: Green Screen
I just recently finished two days of green screen shooting with the DVX and here is the setup I used.
I had a 12X12 Green Screen, this was the foam like material, I went for this material because the green doesn't bounce off the screen on to the talent as much as using green paper or a muslin type material. The screen cost me $45/day. You will also need (2) Combo Stands and a 12' Pipe to hang the green screen.
Next I used (4) 1K Baby's to light up the green screen. I did a cross lighting pattern so the entire screen was lit even.
Next I took (1) 1K Baby with a minus green gel (purple) and used it for a backlight. The reason for the minus green is that is takes out any green that is bouncing off the screen and onto the talent.
I had my talent 15' away from the green screen. I find it's better to get a larger green screen so then you can have more distance between your talent and the green.
As for lighting on the talent, I used (2) 4' 4bank kino flos. The kino's are great because for someone with light skin I'd used only two of the bulbs per bank. With the talent that was darker skin I'd use all four.
I shot with the F5 settings. (24p Progressive) and I'm keying out the footage in AE 6.0 Pro, using the Keylight plug in.
I have been doing test with the DVX for a couple months now and I have say this is the best approach I have done so far. As for price, the entire package cost me about $400/day.
Results: A very clean key.
I just recently finished two days of green screen shooting with the DVX and here is the setup I used.
I had a 12X12 Green Screen, this was the foam like material, I went for this material because the green doesn't bounce off the screen on to the talent as much as using green paper or a muslin type material. The screen cost me $45/day. You will also need (2) Combo Stands and a 12' Pipe to hang the green screen.
Next I used (4) 1K Baby's to light up the green screen. I did a cross lighting pattern so the entire screen was lit even.
Next I took (1) 1K Baby with a minus green gel (purple) and used it for a backlight. The reason for the minus green is that is takes out any green that is bouncing off the screen and onto the talent.
I had my talent 15' away from the green screen. I find it's better to get a larger green screen so then you can have more distance between your talent and the green.
As for lighting on the talent, I used (2) 4' 4bank kino flos. The kino's are great because for someone with light skin I'd used only two of the bulbs per bank. With the talent that was darker skin I'd use all four.
I shot with the F5 settings. (24p Progressive) and I'm keying out the footage in AE 6.0 Pro, using the Keylight plug in.
I have been doing test with the DVX for a couple months now and I have say this is the best approach I have done so far. As for price, the entire package cost me about $400/day.
Results: A very clean key.
Re: Green Screen
Exposing the green screen in about half the light used for the main subject will deliver a quite saturated green.(e.g., 100 footcandles on talent 12-15 feet in front, and 50 footcandles as even as possible on green). It works for me. Hope it can help somebody else. I've found that lighting the green screen at the same level as the talent produces a slightly washed-out green that reacts a bit differently...
...not really a camera set-up thing...merely a lighting idea...
sorry for mixing the topics...
Exposing the green screen in about half the light used for the main subject will deliver a quite saturated green.(e.g., 100 footcandles on talent 12-15 feet in front, and 50 footcandles as even as possible on green). It works for me. Hope it can help somebody else. I've found that lighting the green screen at the same level as the talent produces a slightly washed-out green that reacts a bit differently...
...not really a camera set-up thing...merely a lighting idea...
sorry for mixing the topics...
bgundu
Veteran
Re: Green Screen
[quote author=Egoboy link=board=news;num=1068451865;start=0#9 date=04/30/04 at 18:33:17]
I shot with the F5 settings. (24p Progressive) and I'm keying out the footage in AE 6.0 Pro, using the Keylight plug in.
[/quote]
I'm surprised you shot at the F5 setting. Even though are shooting in progressive mode, at the F5 setting, the footage is interlaced. I would suggest shooting real progressive with the F6 setting. You will have much cleaner keys, and less footage to render.
[quote author=Egoboy link=board=news;num=1068451865;start=0#9 date=04/30/04 at 18:33:17]
I shot with the F5 settings. (24p Progressive) and I'm keying out the footage in AE 6.0 Pro, using the Keylight plug in.
[/quote]
I'm surprised you shot at the F5 setting. Even though are shooting in progressive mode, at the F5 setting, the footage is interlaced. I would suggest shooting real progressive with the F6 setting. You will have much cleaner keys, and less footage to render.
Re: Green Screen
F5 and F6 (assuming they are not changed) are both real progressive formats when shooting 24fps. Again it all depends on what NLE you are using in the end. AFter Effects can render out the NORMAL 2:3 pulldown of NORMAL and create progressive 24 frame media (23.976).
Michael
F5 and F6 (assuming they are not changed) are both real progressive formats when shooting 24fps. Again it all depends on what NLE you are using in the end. AFter Effects can render out the NORMAL 2:3 pulldown of NORMAL and create progressive 24 frame media (23.976).
Michael
Re: Green Screen
[quote author=Bob Gundu link=board=news;num=1068451865;start=0#11 date=05/01/04 at 21:46:55]
I'm surprised you shot at the F5 setting. Even though are shooting in progressive mode, at the F5 setting, the footage is interlaced.
[/quote]
So is F6.
[quote author=Bob Gundu link=board=news;num=1068451865;start=0#11 date=05/01/04 at 21:46:55]
I'm surprised you shot at the F5 setting. Even though are shooting in progressive mode, at the F5 setting, the footage is interlaced.
[/quote]
So is F6.