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application crashes with multi OptiTrack
Posted: Mon Aug 08, 2005 2:54 pm
by yoshi
I purchased six OptiTrack cameras and trying to track 30 markers for my motion capture application. However, the application usually crashes within 10 sec with unhandled exception error.
OLEAUT32! 77124912()
OLEAUT32! 7714d2c0()
OPTITRACK! 00aa6558()
OPTITRACK! 00aa85cd()
OPTITRACK! 00aa8b0f()
I tried the VC6 sample code that came with OptiTrack, but it also crashes in a few minuites, just tracking a single marker. It works fine if only one OptiTrack camera is used.
Please tell me what I am doing wrong. My system is Dell Dimension 8400 Pentium 4 3GHz, 1GRAM, XP sp2, VC6 sp6.
Is there another sample app that works with multiple OptiTrack cameras? Is the OptiTrack dll source code available for debugging?
Thanks.
Re: application crashes with multi OptiTrack
Posted: Fri Aug 19, 2005 5:31 pm
by yoshi
For others reading this message, NaturalPoint support responded promptly and provided the fix within 5 days.
Hyper threading processor of my PC was causing a race condition in the driver. Now I can get 120 fps from six cameras using more than 30 markers.
Re: application crashes with multi OptiTrack
Posted: Tue Sep 06, 2005 9:12 am
by markdc
I'd like to hear about the system you're putting together. Do you plan to sell it?
Re: application crashes with multi OptiTrack
Posted: Sat Sep 10, 2005 4:34 pm
by yoshi
It's a single person full body motion capture application. I've got the calibration, 3d marker position calculation, skeleton posing from markers, and bvh file export working. Now I am working on marker tracking part. I think it will still take a few more months to finish it.
Re: application crashes with multi OptiTrack
Posted: Mon May 08, 2006 5:02 pm
by roman tunkel
quote:Originally posted by yoshi:
It's a single person full body motion capture application. I've got the calibration, 3d marker position calculation, skeleton posing from markers, and bvh file export working. Now I am working on marker tracking part. I think it will still take a few more months to finish it.Can you help me to develop tracking system One camera - 2 markers?
I need to know X,Y,Z,roll,Az,Elev (6DOF) for each marker.
C will be preferable...
Thanks
Re: application crashes with multi OptiTrack
Posted: Wed May 10, 2006 4:35 am
by Birch
quote:Originally posted by ronatu:
Can you help me to develop tracking system One camera - 2 markers?
I need to know X,Y,Z,roll,Az,Elev (6DOF) for each marker.
C will be preferable...
ThanksAs far as I know it is technically not possible to extract 6DOF using only two markers and one camera (with our cameras, at least), you would either need to use two cameras (but would still only get 5DOF with two markers) or more markers. You may wish to re-evaluate the criteria for your system and determine whether you can change them.
[ May 10, 2006, 11:36 AM: Message edited by: NaturalPoint - Birch Zimmer ]
Re: application crashes with multi OptiTrack
Posted: Thu May 11, 2006 3:38 am
by roman tunkel
quote:Originally posted by NaturalPoint - Birch Zimmer:
quote:Originally posted by ronatu:
Can you help me to develop tracking system One camera - 2 markers?
I need to know X,Y,Z,roll,Az,Elev (6DOF) for each marker.
C will be preferable...
ThanksAs far as I know it is technically not possible to extract 6DOF using only two markers and one camera (with our cameras, at least), you would either need to use two cameras (but would still only get 5DOF with two markers) or more markers. You may wish to re-evaluate the criteria for your system and determine whether you can change them.My mistacke - two cameras.
But 2 markersand I need to know X,Y,Z,roll,Az,Elev (6DOF) for each marker.
Programming in C will be preferable...