change from where the fps are read
change from where the fps are read

If the fps is calculated from the timestamps, I want to save an
attribute fps different from the expected_fps.

ljschumacher/tierpsy-tracker,ver228/tierpsy-tracker,ljschumacher/tierpsy-tracker,ver228/tierpsy-tracker,ver228/tierpsy-tracker,ljschumacher/tierpsy-tracker