DGFilms wrote:TZuck wrote:Yes filming vertical will work (cameras wont break if you tilt or rotate them), just be aware that the rolling shutter will be coming from the side now.
Also as a VFX artist that keys footage almost daily, please use something better than FCPX to key, reframe, and rotate your footage... I prefer Primatte Keyer in After Effects (Separate plug-in through Red Giant).
Also make sure you light the green screen correctly, avoid flares, be aware of reflective surfaces, and make sure they don't wear green on green screen unless you want a floating head.
Keying is key to any green screen work but has nothing to do with frame rates and good lighting, I would agree with TZuck use a decent keyer like Primatte Keyer, But keylight is free with AE 5.5 or above and works a treat with a few other built in plugins,
But hey that's another topic, that probably doesn't belong here.
Good luck
Keylight is free going back before CS4.
and as far as lighting goes I was speaking about lighting the actual green screen, because this is a very important thing when keying. will save you so much time and trouble if you light the green screen correctly.
so yes good lighting has a lot to do with keying. frame rates not as much as shutter speed/angle and even that is preferential in my opinion.
and as far as why would you want to film vertically: well as a VFX artist its really nice to have as much possible resolution as I can get. If you film a tall person on a wide format, you have a ton of wasted space. shooting vertically gives you ~78% more room to work with so you can use one shot for anything from as wide as you want to a good medium close up. where as shooting horizontally gives you only wide to super wide.
now the only caveat to this is depending on the action that the talent is doing, if they are going to be running around then you'll shoot horizontal, but if you film in 2.5k the more resolution the better. It's why 4K is very attractive, you take the initial hit up front, but then you can repurpose shots for delivery in todays age (1080p or lower unless cinema)
UPDATE:
i recommend still filming 2.5k raw for green screen if you don't mind the space it will take. RAW is awesome for VFX, gives you so much more control than ProRes. Trust me.
also its 2400 x 1350 for the 2.5k