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Thread: Data synchro drift

  1. 09-30-2018 #1
    Armaki
    Armaki is offline
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    Oct 2015
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    Data synchro drift

    Hi,
    I am using Race render to overlay my rally videos (3x GoPro Hero2 cams) and my data acquired from a Race Technology DL1 logger.
    The Cameras are Running at 25Hz and the Logger at 100hz.
    I can synchronize the data at the beginning of the video, but at the end of the video, the data have drifted. The longer the video, the more the drift. I know the Play speed trim, but it doesn't seem logical, because of the frequency ratio between video and data.
    Any hints?
    Thanks
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  2. 10-17-2018 #2
    AussieMSM
    AussieMSM is offline
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    Jun 2016
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    I have this same issue with a GoPro Hero4 Silver and Aim Solo DL.

    It seems like a frequency issue but can't seem to resolve it.

    Could it be that GoPro uses a Variable FrameRate causing the drift issue with the logging data?
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