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Fix remnants of Green Screen after chromakey

askwpcoach's picture
Last seen: 1 year 7 months ago
Joined: 09/06/2012 - 10:48pm

Hello,

I am working on creating youtube vids for my uncles clothing store, and I'm using footage shot on Green Screen. I have Vegas Pro 11 and used the Chroma Key filter. As you can see in this quick shot:http://www.screencast.com/t/JW8rpH8pklD - when she walks you can see theremnantsof the Green Screen.

I tried following this tutorial:

http://www.sonycreativesoftware.com/solving_tough_keying_problems_in_vegas_software

However I can't find theReset to Nonepreset for theColor Corrector (Secondary) filter.

As you can see here:http://screencast.com/t/fvi9uU7pUfQw- it's not shown.

If there is anyone that can help me clear up the dark areas shown above it will be of great help - I'm a complete newbie (this is my first green screen project ).

Kind Regards,

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Jack Wolcott's picture
Last seen: 3 months 2 weeks ago
Joined: 01/02/2008 - 11:51pm
Plus Member

For "Reset to None" you should be able to disable or delete the FX from the FX chain. Click on the FX box at the right hand end of the clip.

As for the chroma key problem, you might try using the key more than once. In other words, key for the basic green. They key again for the green that remains. You may have to do this a couple of times; if you do it carefully you can probably get rid of all the green halo.

Jack

VideOccasions


Rocky M's picture
Last seen: 1 month 1 week ago
Joined: 03/12/2010 - 5:53am

Your problem appears to be that when the talent walked into shot they cast a shadow on your green screen resulting in the keying not working where and when those shadow occurred. Trick is to keep talent at such adistance in front of green screen to avoid shadows, ensure the green screen is lit evenly with out any hot spots, avoid creases in green screen material.There maybe things you can try to fix your current problem (i) use a crop tool (ii) change the background from a room to green bush/trees etc. (iii)try whatJack advises(iv) try to adjust your brightness levels (v) place an advertisment for you uncles shop over the effected area..... etc. etc...Good Luck.


askwpcoach's picture
Last seen: 1 year 7 months ago
Joined: 09/06/2012 - 10:48pm

Thanks for the help Rocky & Jack. I'm going to try these suggestions all weekend.



Jack Wolcott's picture
Last seen: 3 months 2 weeks ago
Joined: 01/02/2008 - 11:51pm
Plus Member

When you use the chroma key function you must "tell" the computer what green you're keying out by selecting a portion of the green. So, if after the first pass you still have green showing it's because the green remnant is a slightly different value than the green you originally selected.

After making the initial pass, select the chroma key FX again and select the remnant green as the color to key out. You may have to tweek a bit but you should be able to get rid of the green entirely.

Jack

VideOccasions


billmecca's picture
Last seen: 3 months 2 weeks ago
Joined: 08/27/2010 - 3:31pm

I cannot see the clip here at work (shhhh!) but one trick that might help is to boost the green values a bit on the original footage, and then add the chromakey effect, it might make them a bit more unique. Just don't do so much that it affects skin color etc.

also check the Vaast site, Douglas Spotted Eagle did a tutorial on using a garbage mask (not that it ever helped me when I used vegas. ;-\ ) butit might help you.