Opening the picture, Tracker creates 9 more identical frames with a frame rate of 10 fps.
I change the frame rate to the correct for the chronophotograph value of 14,93 fps.
After finishing tracking, I save the card (*.trk file).
Re-opening the trk file, the time data are incorrect. Τhey seem to have been calculated at the default frame rate of 10 fps and not at the value I entered during tracking. But in the Video Clip Settings the value I have given for the frame rate is maintained.