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So this may be the dumbest chromakey question ever ...

Up to Chroma Key

So this may be the dumbest chromakey question ever ...

Can you use chromakey with video you shot with a webam? (Presuming you shot in front of some kind of greenscreen, of course.)

I am incredibly new to even shooting and editing, let alone chromakey. Actually, technically I have more chromakey experience than I do film experience, given that I was once a performer in a chromakey show in a theme park. But still.

I'm gearing up to do a sort of pop culture/entertainment commentary vlog. And I think it would be much nicer to have the background of my choice than it would to feature my hideously messy apartment. So I was wondering if I could get all fancy with the chromakey. But from what I've gleaned from the few chromakey posts I've skimmed here, resolution may be a stumbling block.

Do not be afraid of offending me by pointing out any assumptions I've made in this post that are idiotic. I'm very good at many things, and so am at peace about being a moron at a few things.

Any thoughts? Much thanks.

Re: So this may be the dumbest chromakey question ever ...

Posted by Alex Black PermaLink

Ooh ooh I wanna use chroma key for a music vid - but i dont care if the resolution looks like crap, as crappiness almost makes chroma key even more endearing and fun. Do you know if there are any free web applications that will chroma-key-ize my videos for me? Assuing that's even possible i guess - I don't know that much chroma key

Re: So this may be the dumbest chromakey question ever ...

Posted by jimdesade PermaLink

FCP has a really good chroma key... you need a pretty good camera to get results though.

check out my vlog... everything is chroma key, but we use an expensive camera.

Re: So this may be the dumbest chromakey question ever ...

Posted by Zach Brinkerhoff PermaLink

The best chroma key is the keylight plug-in for Adobe After Effects or Combustion. Keylight comes free with After Effects, that plug-in is great, reminds me of working with masks in photoshop. It has a lot of the same tools as photoshop too. If you can't afford those programs, just go with Final Cut Pro or Adobe Premiere Pro. Using photoshop helps out a lot to with difficult keys like painting out lights and people that are not supposed to be in the shots.

Re: So this may be the dumbest chromakey question ever ...

Posted by Ghostlight PermaLink
I don't know about Webcams specifically, but the biggest trouble people have using Greenscreen on video cameras is little blocks of green that are hard to get rid of on the edges of your subject. This is because even really good video cameras have lower-resolution green color information, something like half the information. Final Cut pro has a filter called something like "Color Smoothing 4:1:1", found under Video Fitlers/key. That will smooth the green channel (and blue channel) and make it easier to get a smooth edge on your key. Apply the color smoothing filter first, then the keying filter.

Most greenscreen footage I receive was shot in High Definition and I do a similar color smoothing process in Shake. FCP is a good alternative if you don't want to have to learn a separate piece of compositing software.

-Dave
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