I own a Garmin Dash Cam, and one of the features is red light and speed cameras alerts, however this feature is hidden behind a subscription, the camera doesn’t require internet connection all the time, so theoretically the files could be reverse engineered. I tried to do a quick google search but got nothing, does anybody know if this feature has been cracked?
Link to Garmin website for more info: https://support.garmin.com/en-US/?faq=NjIqrNTpHR2wvQecTjtoZ6
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That means your footage would have invalid date/time stamps, making it useless when you need it for its intended purpose.
GPS is a pretty accurate time source.