meaning of text output

[velastin]

Hello.
When running detect_and_track.py with command line parameters save-txt save-conf --colored-trk --save-with-object-id --save-bbox-dim
I get output like the one below.
I guess this is and then?
is confidence output too or not?
Incidentally, do you use confidence in tracking?
Thanks

8 0 0.649219 0.322266 0.659375 0.355469 0.978906 0.500000
7 0 0.809375 0.635742 0.962500 0.847656 1.290625 1.059570
6 0 0.691406 0.402344 0.723437 0.461914 1.053125 0.632812
5 0 0.439844 0.333008 0.451562 0.370117 0.665625 0.517578
4 0 0.425781 0.332031 0.437500 0.374023 0.644531 0.518555
3 13 0.750781 0.510742 0.840625 0.625000 1.171094 0.823242
2 0 0.311719 0.358398 0.335938 0.426758 0.479687 0.571289
1 0 0.653906 0.359375 0.682031 0.447266 0.994531 0.583008

[RizwanMunawar]

'''
trkid, classid, xmin, ymin, xmax ,ymax, centerx, centery
'''