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[CS3] Motion Track with Camera Pan
I am trying to do some motion tracking on a video that is a panning view of some cliffs. In the video the camera pans from left to right, showing the various cliffs.
What I want to do is make it appear as if a picture is on one of the cliffs, in a static, unmoving position. Motion tracking seems to be what I am looking for, and it works, somewhat. The problem is that the part of the cliff I am tracking is not always in the video. It appears about 10 seconds in, and thus I want the image to come into view, bit-by-bit, as the camera pans over.
I have tried normal motion tracking, but it is far from perfect, and very shaky. So I tried a ‘Perspective Corner Pin’, which works great, until the track points hit the side of the video, at which point they follow the side of the screen and the image distorts accordingly. When I do a normal motion track with just Position and Rotation it does what I want, but like I mentioned before the image is shaky, and due to the changing perspective of the cliff (and the fact that the motion track is using a single point for a 4 cornered image), the image moves and rotates improperly as the camera pans.
Any ideas or suggestions would be appreciated.
b1177
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3 Replies
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First off, try motion tracing it backwards. You might get a smoother image that way. and also check out this tutorial, it covers motion tracking off the sides of the comp using null objects and more than one tracker.
https://www.videocopilot.net/tutorials.html?id=16
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Well the tutorial was very helpful, and got me a little closer to fixing my problem, it still unfortunately doesn’t completely help. Also, I have been doing it in the reverse direction, but good suggestion.
I tried setting multiple motion trackers, but the problem still persists. The problem is that the perspective of the cliff changes fairly rapidly at different points, so one motion tracking point governing an entire image isn’t going to cut it. Perhaps I’m just not doing the motion tracking properly, but I’m fairly sure I am.
Its sort of difficult to explain. If anyone is interested in helping they can send me an email and I can send them some footage.
b1177
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Hi Michael
I am currently experiencing the same issues as you, I am aware that the thread was posted in 2008 but on the off chance was wondering wether you had managed to sort the complication out. I can send you my video I am trying to track for the same reasons as you were.
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