Yes, the timestamps are read and used. For this reason, you will get a warning if the frame durations are not all the same when the video is loaded. Pay attention to these warnings--if you analyze a video with unequal frame durations then the calculations of velocity or acceleration will be inaccurate. The algorithms used to determine v and a REQUIRE that the time steps be equal.


> Is the PTS each individual frame considered when measuring
> time, or just the same nominal FPS for the entire
> sequence?
> what happens when VFR variable framerate
> is present?
> Thanks