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by LorenPechtel
12 hours ago
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Recording into the recent past is quite common. You implement it by storing the data *to memory only* until the trigger event happens, then you write out what's currently in memory. It's a common feature in better dashcams--you get say the 30 seconds before the thump that triggered it. Likewise, many high speed cameras that record some short action. They're actually always running, but dumping the end of the data, they only "record" when the trigger happens. |
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