So I want to use the sweeps of CAM_FRONT provided by the scenes dataset for unsupervised learning. However, it is unclear to me what the actual capture frequency is. On the website it says it is 12hz, however if that’s the case, the timestamps don’t seem to make sense.
I read somewhere the timestamps are in microseconds, but when analyzing the timestamps, you can find that the differences between the frames are usually 50, 100, 150, 200 or 250 ms. 12hz would correspond to about 80ms per interval between frames, which never seems to occur.
So what exactly is going on? Are the frames shot at even intervals at 12hz and are the timestamps not exact? Do bigger intervals mean some frames have been skipped?
Or is it the case that the frames are shot at differing intervals and the timestamps are exact and correct?