Hi fellows,  
 
I'm a french junior compositorin Paris, and i have to track a 842 frames crane shot, i have put about 50 trackers manually, and i'd like to average the solution with autotracks. The problem is that during the autotrack process, the frame 500 make all the autotracks disapear, all is normal until and after frame 500, in that frame all the tracks are reseted. Of course the result is a big bump in the curves at frame 500. How is it possible is there a solution thank you for the help.

Bonjour,
peux-tu mettre les images et ton projet *.mmf sur un ftp pourque je puisse jetter un oeil?
Cordialement
Tim

Sorry i can't put the footage on the net, but i found a workaround, i began a new project and then autotracked, it went well this time, so i exported the tracks and imported them back in my original project. I have autotracks now so my solution is much better. But i still dont understand what the real issue is. Thank for your help anyway, and if you think of something tell me !