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Motion tracking a hand held camera moving forward…
I am beating my head against a wall with this one so you will have to forgive me for any breakdown of logic.
Okay, so i am trying to motion track a scene where a handheld camera is moving through a room of people. While it is moving forward the back walls off the room open to reveal a green screen, where another scene needs to be composited so the idea is that the camera seamlessly moves into the next scene. There are no tracking points on the green screen, and because the back walls are swinging open I cant track them… on top of that the room is filled with people, moving people. I have tried to track anything i could find, I have tried to do it by hand but there is no solid reference point.
If anyone has any idea what to do in this situation I would be more than greatful.
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2 Replies
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This offends me.
Handheld. No markers.
Idiots. (not you)
This is what happens when Directors (or producers) shoot without Post in mind.– You can’t track a scene that has no static points in frame.
– You can’t even guess by measuring the room (as you might in a straight dolly shot) because the shot is handheld, and you can’t predict the motion.
– AE can’t track and find a 3D solution anyway. PFTrack or Syntheyes do that. I’m using Syntheyes on a job right now, by the way. But they’d be useless here, too.
– You now have to sell the idea of the two scenes not being matched up. The new scene has to appear static, whereas the old scene (the room) will appear jerky. Two different worlds. Then you try to fake the z-movement of the handheld camera towards the green room, ignoring the X- and Y-movement, so you can dolly into the other scene.Tell them they should have consulted you, and they get what they get. Geeeeez ….
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any chance you can post the scene?
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