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Motion Tracking Nightmares !!!!!
Hi,
I’m getting screwed big time on a project for my school. I wanted to make a video , which has a girl painting on an empty canvas, and she generated ink bleeds on the white paper. I tried Boujou, AFX …but the trackers won’t just hold.
The trackers are holding fine on the edge of the white paper/ floor i.e the contrasting pixels, but the ink bleed QT is not getting stuck !!
The moment I’m applying the tracking data to the ink bleed QT, the ink bleed QT is changing its position and going to a corner position on the canvas..instead of staying on the center of the paper…I’m just going crazy with this …somebody please help me before i kill myself !!!
This is a link to the image file…
https://www.flickr.com/photos/31464191@N07/3391927530/
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3 Replies
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Also I have uploaded a scratch video…so the problem can be clearly made out…
https://www.youtube.com/watch?v=b8gEwgHet8w
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Hi Rajarshi,
Try using the corner pin tool. Track each corner of the paper separately, apply corner pin to your ink bleed video then use the pickwhip to link corner pin coordinate to the corresponding corner. That should hopefully solve your problem.
Graham
http://www.YouTube.com/ShiveringCactus – Free FX for amateur films
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I think there are a few things at play here… firstly, if your track isn’t DEAD ON you will see some shifting, because the paper is so large and central on the screen, so it will be very noticeable.
You could try averaging a few different trackers to get solid tracking data (if you search for this you will find some explanations, and TrackerViz is a great script you can freely download).In terms of the ink blot moving position, you have a few options. You can translate all the tracking data by adjusting the anchor point for the ink layer. Apply the data, then shift the anchor point and all the position keyframes will still do their thing but be offset by the difference.
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