Jump to content


Photo

RED Epic and Live Chroma Keying for Godzilla-like effect


  • Please log in to reply
2 replies to this topic

#1 David McDonald

David McDonald
  • Basic Members
  • PipPip
  • 38 posts
  • Director
  • Vancouver, Canada

Posted 04 December 2011 - 04:54 PM

I'm shooting a music video very soon and basically the concept behind it is the performer will be like a giant or godzilla walking around the city....and the plan is to shoot a bunch of empty plates of the city and whatever else we want to comp him into, and then on a separate day shoot the performer in front of a green screen and try to match the angle and perspective of the performer in front of the green screen to the angles of the plate we already shot.

So what I would like to do is somehow be able to connect the camera to a macbook pro and overlay the plate of the city with the live green screen shot and put it at half opacity to see if the perspective is correct. I've looked into a few programs that do live chroma keying, I think I might just use Veescope since it's fairly cheap and should get the job done. But I don't even know if it's possible to connect the RED Epic to a computer to do this. As far as I know the only input I can think that would work to connect a macbook pro to an Epic is the HDMI,since the camera has an HDMI input and the macbook pro has a mini display to HDMI connection......but I'm not exactly sure what would happen once those are connected....would the macbook pro become a mirrored display of the camera?

I've never done anything like this so I may have it all wrong....does anyone have any experience with this sort of thing or can think of a good way of pulling off what I'm trying to do? If I can't do some kind of live monitoring, I may just have to resort to eye-balling the perspective by putting the macbook pro next to the monitor and try to get it as close as possible, which could work, but it would be nice to get it a bit more exact.
  • 0

#2 Phil Rhodes

Phil Rhodes
  • Sustaining Members
  • 11943 posts
  • Other

Posted 04 December 2011 - 08:28 PM

Usually this would be done in standard def using a composite output from the camera and the computer, and a basic domestic/industrial vision mixer such as a Panasonic WJ-AVE5 or WJ-MX50, both of which are now made out of purest unobtainium as they've been out of production for years and are critical to certain kinds of work.


I've done quite a bit of it. Does the epic have some sort of composite out on it? Can you convert the macbook to composite? If so, you're set if you can get a mixer. Of course it'll look rough as hell but you'll have the reference you need for perspective and framing. The only wrinkle is how the images are framed and the aspect ratio - whether the standard def feeds are widescreen or 4:3, and how the active picture area appears inside that area. Probably you will be able to futz this with the macbook, scaling and shifting the image (even just in Photoshop) to suit the image from the camera.


You were considering having someone to do this for you, right?


P
  • 0

#3 Robert Houllahan

Robert Houllahan
  • Sustaining Members
  • 1584 posts
  • Industry Rep
  • Providence R.I.

Posted 07 December 2011 - 12:05 PM

The Epic has HD-SDI output (no analog) you could get a new Macbook-Pro with Thunderbolt and use something like the Blackmagic Ultrastudio 3D to get the feed from the camera into the laptop and then use an app to do a live key to check. I am not sure what app to use but I think the Blackmagic live key app which is bundled with any Blackmagic card/box will do it.


-Rob-
  • 0


CineTape

Willys Widgets

rebotnix Technologies

Wooden Camera

Glidecam

Ritter Battery

Abel Cine

Broadcast Solutions Inc

Tai Audio

FJS International, LLC

Gamma Ray Digital Inc

Rig Wheels Passport

Opal

Paralinx LLC

Media Blackout - Custom Cables and AKS

Technodolly

The Slider

Visual Products

Metropolis Post

Aerial Filmworks

CineLab

Aerial Filmworks

Glidecam

Broadcast Solutions Inc

Technodolly

Willys Widgets

Paralinx LLC

Media Blackout - Custom Cables and AKS

FJS International, LLC

Tai Audio

Rig Wheels Passport

Gamma Ray Digital Inc

CineTape

Metropolis Post

Wooden Camera

Abel Cine

Ritter Battery

rebotnix Technologies

CineLab

Visual Products

The Slider

Opal