pogo wrote:
smeggy wrote:
You could even store the looped live footage in RAM – less wear on hard drive.
You'd have to have some form of either on-board battery backup or battery-powered dump to a non-vol medium though - else a shunt taking out the car's electrics would just allow the data to evaporate at the most inopportune moment!
Depends on the wiring. My Car PC has it's own dedicated wire directly to the battery, and monitors the accessory circuit to determine when it's time to perform a clean shutdown.
It'd need a fairly nasty shunt to dislodge this wire, and if the accessory circuit goes it presses the power pins on the motherboard instructing windows to go into hibernate, thus preserving the contents of the RAM.
I can remove it from the car and power it up from a 15V laptop PSU that I have modified for this purpose and extract the data.
Having said that, I'd still rather it was on the hard drive, just incase the motherboard gets damaged.