tomo2607 Posted September 14, 2010 Share Posted September 14, 2010 Hi all, Further to my last query regarding an open day... Is it possible to set up a real time green screen, using an I3 powered Imac? For a school open day I want to simulate a weather report synario. I want to allow students to walk in front of a camera and then they can see them selves on a screen with a different background, such as a weather report or world land marks etc. I can do it to pre recorded video footage, but I really want to acheive a real time effect. This would also be usefull for the A level students when directing there footage. Any advice is welcome. however im on a budget so not really after a bbc style equipment list Link to comment Share on other sites More sharing options...
CharlieH Posted September 14, 2010 Share Posted September 14, 2010 Hi all, Further to my last query regarding an open day... Is it possible to set up a real time green screen, using an I3 powered Imac? For a school open day I want to simulate a weather report synario. I want to allow students to walk in front of a camera and then they can see them selves on a screen with a different background, such as a weather report or world land marks etc. I can do it to pre recorded video footage, but I really want to acheive a real time effect. This would also be usefull for the A level students when directing there footage. Any advice is welcome. however im on a budget so not really after a bbc style equipment list :)Possibly not quite what you're after, but if you are using a Mac 'Photo Booth' has a green screen style effect, and if you used a proper green screen as a backdrop could work quite well. You can use the built in backgrounds (both static and moving), but also you can drag and drop your own. Just an idea.... Link to comment Share on other sites More sharing options...
dbuckley Posted September 14, 2010 Share Posted September 14, 2010 Have a look at Isadora, it can do chroma keying. You can use it freely with the niggle that you cant save your setup, but for just one playback with a green screen it'll probably take a couple of minutes to program that up when you load the application. And it even works on Macs. So I'm told! Link to comment Share on other sites More sharing options...
lightsource Posted September 15, 2010 Share Posted September 15, 2010 To do a succesful greenscreen (or other colour): :The quality of the camera is very important, especially the colour information recorded by the device.:Uniform lighting of the screen. Camera's such as the Panasonic AG-HVX201AE (P2 memory card based) should probably give much better results than the average Sony Camera when keying a Green Screen. Evenly light the green screen, to the best of your ability, as this may save headaches in the future. It would be helpful if you could supply the camera make and model, so we can check the specs. It's one thing for software (whatever) to do keying, It's another for the camera to provide enough colour information. Best results are a marriage of these two features. Please note, it's impossible to accuratley reply to the question you have asked without a comprehensive list of the equipment you are using, and the timescales involved. I3 Powered Imac is only one link in the chain. Link to comment Share on other sites More sharing options...
kitlane Posted September 15, 2010 Share Posted September 15, 2010 Magenta backlight onto the talent will reduce green spill. I wish they would do this on the BBC TV weather, there's been some shockingly bad chromakeying lately Link to comment Share on other sites More sharing options...
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