www.ssontech.com

[cheerioboy]

First post! I am a 3d artist and only recently started to use syntheyes as a way to do more of my job. So I'm going to get to be on set for a green screen shoot as the vfx supervisor and I want to make sure I've thought everything through for the most part.

so breaking it down:

It's a green screen shoot, two walls and a floor of green.

The footage will be roto'ed

From what I've heard so far there will be several shots that will make large arcing pans of the scene, which might leave room for some great parallax unless the ceiling or floor is framed out.


So. I'm planning to put up as many markers as I can on the walls and floor, evenly spaced, four or five rows. No plans for markers on the ceiling.

Now I saw this video tutorial on duber -- http://www.duber.tv/en/matchmoving/syntheyes-tracking/

basically the tutorial goes over how you can use extra footage, footage that actually has parallax of the scene, to get better information and then add that information back into another shot. I wonder if anyone else has tried to play around with this concept?

This gives me many crazy ideas of being able to track shots even if only a few tracking points get into a specific shot. Maybe I'm not fully understanding it. If i try to rely on this method, then wouldn't every shot that is at a different focal length need its own 'extra footage' taken at that focal length? Can I use photographs as extra reference? or another lower quality camera?

anything to point me in a direction to get more information about all this would be very cool. for now I'm scouring the syntheyes web tutorials

cheers

[cheerioboy]

hmm. so I've been playing around using still images to try and understand if its possible to align the trackers.

using three pictures moving in an arc of a location, I'm able to get tracking information on the depth of the space. at this point I'm stuck. I have a fourth image that's at a different focal length that I want to now pin the existing points to and align the space to this new view.

does that make sense?

will keep digging~

[gordonrobb]

Have you looked at the tutorial on the site regarding using stills to get a solve that you then apply to a tripod shot?

[cheerioboy]

I haven't! I'll look for it and take a look.

I did find in the Syntheyes user manual pretty much what I was looking for! I think. It's the chapter 'Multi-Shot Tracking'. Using photos of the location on top of the video move. I was able to follow it up to where I needed to add the video shot. It wouldn't load for some reason.

edit: looks like the .avi wont load because of issues with using syntheyes 64-bit, must... break it into framestack...

Ah well, I think this is the right track. And it looks like you can use footage that doesn't match exactly with the actual footage you want to track, focal length and resolution-wise.

very cool...