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Thread: GPS time in export

  1. #1
    Potential Tuner
    Join Date
    May 2017
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    8

    GPS time in export

    Hi,

    Would it be possible to have an option to have the GPS time logged rather than the elapsed time in a session? Or if this is not possible, have the GPS start time of the recording put into the header information?

    I know that the files when exported have the date/time stamp on them, but having the exact GPS time would make syncing up in RaceRender that much easier. I have tend to have 3 video sources and two data sources and having the same time stamp across all of them would be sooooo nice.

    John

  2. #2
    HPT Employee Weston@HPTuners's Avatar
    Join Date
    Jul 2014
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    There's a bit of a complication in logging the raw GPS time itself, being that the GPS samples we get will have a variable amount of latency in them (due to Bluetooth and the GPS itself). That's a solvable problem, but would take more careful planning and testing. What we can do very easily is to add a data channel with the device's UTC time. Most iOS/Android devices are set to automatic time updates, so they're pretty accurate to each other. That should be able to get you within a second.

    This will be in the next app update (version 3.6.5 or later) and new sessions recorded with it will include a "UTC Time" data channel. It will be logged as an epoch time (number of seconds since 1970), which RaceRender's "Timer - Hours" object can format as a clock time (UTC) if you wish. That should be a cleaner option than you having to look at the timestamp on the file name and then manually add the relative session times to it.

  3. #3
    Potential Tuner
    Join Date
    May 2017
    Posts
    8
    Thanks Weston, look forward to the update and see what works best for me. Having a couple of options will hopefully make syncing a bit easier.