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View Full Version : Using 2d with 3d? help please



malikai666
09-07-2004, 01:44 PM
I have a movie of a band playing and the camera is moving around them shot on a green screen and keyed out.. I want to place them on a 3d ship In LW how do I go about doing this. Im going to match the camera movement of the 2d image in 3d. so it looks like they are on the boat. Any help would be great

Triple G
09-07-2004, 09:59 PM
Doing stuff like this is not easy, and getting the proper software to help you do it is not cheap. If the camera is locked off, you can sometimes get away with tracking the shot by hand, and just kind of eyeballing where you need your 3d objects to be. With a moving camera, it's a whole different ballgame. Attempting to track a shot with a moving camera by hand will surely lead you straight down the road to insanity.

To get quality results, you really need a dedicated 3D tracking/matchmoving software, which will basically analyze your footage and spit out camera data which you can then plug into your 3d scene for a perfect (or at least acceptable) match. You have a few options to consider as far as software is concerned, but unfortunately most of them are pretty pricey:

RealViz MatchMover Pro (http://www.realviz.com/3d_camera_tracking_software.htm) - $11,000
Boujou and Boujou Bullet (http://www.boujou.com/jsp/index.jsp) - $10,000 and $2500, respectively
PFTrack and PFMatch (http://www.thepixelfarm.co.uk/) - 3000 pounds and 600 pounds, respectively. As a side note, PFTrack used to be freely distributed on the net when it went by the name of Icarus. To continue development of the program, it was sold to Pixel Farm, had its name changed, and became a commercial app.
SynthEyes (http://www.ssontech.com/index.html) - the least expensive of the bunch at $349, but it's PC-only.

Anyway, good luck with this...hope some of this information helps. :)

Darth Mole
09-08-2004, 02:01 AM
I've used PFTrack and it's very good - much better than MatchMover, judging by mag reviews. Even though it's for DV-only footage, PFMatch uses the same core tracking engine as PFTrack, and should do the job well. It's simply a case of running the app, and letting it track - it then exports a LW scene file with the camera moves in place. Simple.

To be honest, this kind of job is practically impossible without matchmoving software - unless your camera is locked off or doing very simple pan/dolly moves that you can perhaps measure and time and then match by hand. If the camera is orbiting or free-roving then you've got no chance.