is it allowed to use opencv track/multitrack in commercial software?

edit

I think so.

There are only a few modules which are not BSD. I can remember SIFT, but may be others...

Added info

Since OpenCV forces people to add stuff under BSD license, unless specifically stated otherwise in special licenses, the following rules apply

 // Copyright (C) 2013, OpenCV Foundation, all rights reserved.
 // Third party copyrights are property of their respective owners.
 //
 // Redistribution and use in source and binary forms, with or without modification,
 // are permitted provided that the following conditions are met:
 //
 //   * Redistribution's of source code must retain the above copyright notice,
 //     this list of conditions and the following disclaimer.
 //
 //   * Redistribution's in binary form must reproduce the above copyright notice,
 //     this list of conditions and the following disclaimer in the documentation
 //     and/or other materials provided with the distribution.
 //
 //   * The name of the copyright holders may not be used to endorse or promote products
 //     derived from this software without specific prior written permission.

So basically you can do anything you want with it, as long as you keep the copyright notice!