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My actor is flickering, help me!

Posted: Wed, 24th Nov 2004, 2:31pm

Post 1 of 10

Underdog Productions

Force: 1235 | Joined: 1st Dec 2003 | Posts: 106

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This is my problem. Filmed a conversation over a table with a green screen so I can put the background in later. did it this way to have more contol over the environment. filmed it at night in my front room so everything was silent. anyway, i lit the green screen evenly and lit my actor sererately. put it into good old chromy and it keyed out perfectly.

So far so good. then just to touch up. set erode alpha to 2 and alpha blur to one then added spill surpression. the illusion was perfect, i was chuffed to bits and exported it to play with it in premiere. This is where the horror beings. it was only then i noticed a "flicker" all round my actor. especially around his hair. so i went back into chromy, set the alpha erode to 3 and expoted it again. this lessened the problem but it was still there. so i went back in and set alpha erode to 4. there was no more alpa left so it eroded my actor! i still exported it and sure enough the slight flicker was still there.

i have searched through every post on here to find a solution to this but not found anything. Or is there no solution? will there always be a slight flicker? if so i can accept that. but there are films on here made with chromy with no flicker so what is the problem most likely to be?

as i have stated above, it was evenly, the actor lit seperatly, no shadows. it keys out perfect, and with a bit of fiddling, alpha erode, blur, spill surpression etc it looks amazing. but when u watch it back or flick through each frame quickly on chromy there is a flicker of alpha. And it is slowly driving me insane.

Please help me, or all chip in for a sniper to put me out of my misery.

Cheers guys I know you can help me
Posted: Wed, 24th Nov 2004, 2:37pm

Post 2 of 10

Simon K Jones

Force: 27955 | Joined: 1st Jan 2002 | Posts: 11683

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FXhome Team Member

Why are you using the erode filter? Is there a specific need for it? As it could be causing the problems - it should only be used really with troublesome greenscreens when you need to do some serious fiddling. If you've already pulled a good key, you shouldn't need to use it.

Any chance of a few high quality screengrabs of the greenscreen footage and a video of the problematic flickering?
Posted: Wed, 24th Nov 2004, 2:45pm

Post 3 of 10

Underdog Productions

Force: 1235 | Joined: 1st Dec 2003 | Posts: 106

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i'll get some pics sorted. cant do video clips unfortunately because i have no host
Posted: Wed, 24th Nov 2004, 3:35pm

Post 4 of 10

Underdog Productions

Force: 1235 | Joined: 1st Dec 2003 | Posts: 106

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ok here's the footage i'm strugling with. not sure if i have done the links correctly so i have put the page address just to be safe

[url=http://groups.msn.com/_Secure/0ZwDjAowii0d9OX8hHpbFsXLSSZILibuEG7ZGgta4**V8ViQGUScBr8ru3vScfx4pfuEsZHlHS2g*4qeHYB52n7EC8LB*21VZVpsSqDEVNAkRhbVoy7nFV6ochcfhj1!7OMs!giZblwqbbbRFdSiLSA/chromy%20greenjp.JPG?dc=4675498829507380276]Link One[/url]

[url=http://groups.msn.com/_Secure/0cQDZAgUmIr99OX8hHpbFsXLSSZILibuEPnNym7FMi7!zY0lzxg4iSz5ElOtFtuv!qms1IwH3Qq86HUwqhpf4SiilhcX9x24Gjsmq0DeJpf!ggwZvjiO8jPqeApXtPB1YIiZjJIpeBt2CJ!VvTlgVmlA6Z7*Kp0Hm*NkGreEAT6M/chromy%20green%20removedjp.JPG?dc=4675498829642994663]Link Two[/url]

if they dont work this is the green screen footage: Green Screen

and this is the key i did for it: Keyed
Posted: Wed, 24th Nov 2004, 3:48pm

Post 5 of 10

Simon K Jones

Force: 27955 | Joined: 1st Jan 2002 | Posts: 11683

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FXhome Team Member

Definately try it without the erode filter. With a bit of key grade fiddling I can pull a good key on that jpeg, so I imagine it'll be easier with the original footage. Of course, I have no way of testing how it looks in motion, unfortunately.

Here's a preset for the settings I used:

http://tarn.fxhome.com/AndrewPreset.tool_preset

Did these quickly so they might require tweaking. As a rule, I try to only use the erode and alpha blur filters in emergencies, and as minimally as possible. They're great if all else fails, but if you can pull a good key without 'em, all the better.
Posted: Wed, 24th Nov 2004, 3:53pm

Post 6 of 10

Underdog Productions

Force: 1235 | Joined: 1st Dec 2003 | Posts: 106

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thanks. i'll check it out. how do i load these presets up in chromy?
Posted: Wed, 24th Nov 2004, 3:54pm

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Simon K Jones

Force: 27955 | Joined: 1st Jan 2002 | Posts: 11683

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FXhome Team Member

Download the preset to your hard drive, then load up Chromy. Select your greenscreen clip and switch to the object interface. You can now click on the drop-down menu icon at the top of the inspector and choose 'Load preset'. Then click on 'Import preset'.
Posted: Wed, 24th Nov 2004, 8:00pm

Post 8 of 10

Underdog Productions

Force: 1235 | Joined: 1st Dec 2003 | Posts: 106

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having trouble loading that preset. i saved it to my desktop then tried to load it it in chromanator but nothing is showing up? to save it to my computer do i just right click on the preset and click "save as"?
Posted: Thu, 25th Nov 2004, 12:50am

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Marek

Force: 2225 | Joined: 25th Dec 2002 | Posts: 1754

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You might have to put it in the '\My Documents\Chromanator Files\presets' directory. Not sure, but thats where they all go when you save them.
Posted: Thu, 25th Nov 2004, 12:53am

Post 10 of 10

Simon K Jones

Force: 27955 | Joined: 1st Jan 2002 | Posts: 11683

VisionLab User VideoWrap User PhotoKey 5 Pro User MuzzlePlug User PowerPlug User PhotoKey 3 Plug-in User FXhome Movie Maker FXpreset Maker Windows User

FXhome Team Member

You need to use the 'Import' button on the load preset screen. Then it'll appear in the list and you can apply it to the object.