Originally Posted by
HoboBob
Any chance you can provide a Google Drive/Dropbox link for your data and video?
Racerender will align the time (either from GPS or start of the session) as the marker for the row of data, so I would think that would be pretty accurate. It will also interpolate data so that if a frame falls between two rows, it will pick the value between the values in those rows (appropriate for the time when the frame occurs).
Perhaps the data for the lap is simply starting 3 seconds early (i.e. the start/finish line need to be adjusted or the "Lap 0"/Out lap timing needs to be adjusted)?
If you find that every lap is 3 seconds too fast, then there is a "Play Speed" option on the Configure Input File screen on the top right. You could change that to something like 0.985 or something to slow the data down, but I would guess that you just need to line up the start of the lap with when the data thinks the lap starts.