Correcting Time Offset
Obviously, getting accurate time from the start is the goal - and a WiFi equipped GoPro is a big help - but there are going to be times when the time of the cameras is not set accurately.
Fortunately, Lumberjack System has a built in way of correcting for inaccurately set camera clocks (up to 99 hours). The biggest challenge is usually knowing what the offset is, which is why our practice - and strong recommendation - is to shoot the logging screen for a few seconds as the first shot of the day.
Without this reference it can be very difficult to precisely determine time offset.
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Be very careful to frame the shot first, making sure that the time display is visible, before rolling. The offset is easiest to calculate when you can compare the first frame of the clip (showing the Logger time display) with the time stamp of the media file for the same frame.
We have also had great results with Atomic Clock by CompuLab. The larger display image is easier to shoot. The Atomic Clock display time matches the Logger display time because both depend on the same atomic clock UTC.
This is a particularly difficult offset as the camera time was not directly set, being at its production default and showing May 27th at 9:05pm, while the shoot was on May 31st, starting at 1:40pm. That's three days, 16 hours and 35 minutes earlier, or 88 hours and 35 minutes different. Because the logged time is before the shoot time, the offset is entered as a negative. If it were the other way around, the offset would be positive.
The offset was entered in Lumberyard and - as easy as that - the time offset is corrected.
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