Originally Posted by dashdriver
And I've charged and won court cases similarly when I could prove the front vehicle was "brake-checking" on purpose. Absent an admission from the front vehicle's driver, it is difficult to prove however.
Dashcams are not always as wonderful as they seem. They do not have the depth or width of view, the resolution or the "capture rate" (frames per second) of the human eye. Therefore something you see out your front window may not be accurately captured by the dashcam. Additionally, it only captures out the front window and will not capture the erratic driving the road rager is displaying behind and alongside you that led to the action in front of the camera. Not saying dashcams are useless, they just have limitations and are not 100% reliable "proof" in court.
I've been pondering the idea of using the motorhome's back-up and mirror/sideview cameras routed into a DVR of some sort. This way you could also mount a camera on the dash or at the top of the windshield and have 4 channels of video going into the DVR, and be able to show almost all of the crazy driver's path. I know there are solutions out there with 4-16 video inputs into a PCI card for a computer, but that would require making it a full computer, not just a standalone DVR. The up side of making it a computer is you can put whatever size hard drive in it you want, for much longer recording time compared to these flash card based dash cams.
This all could be mounted in a low-power PC, assuming the capture card is doing the video encoding. If it's low-enough power and/or you have enough battery capacity, you could even run it overnight as a security system.
I do see a couple standalone DVR solutions which would do just this, but it looks like they're going for $400+, which is more than I would spend.
Here's an example of a good one that's relatively low price. It can record from 4 RCA inputs to a hard drive (not included, of course). Rear View Safety Inc 4 Channel Mobile DVR RVS-871 B&H Photo
I can't tell if this is recording all 4 channels separately, or combining them at lower resolution into a single channel. Multiplexing would be less helpful if you're trying to read a license plate, but would still be enough to capture the action.
When "someday" comes and I can afford a motorhome, I want to set it up like this. Until then, I'll just dream and keep reading these boards. And maybe rig something like this in my company car. I already ordered 2 of those ebay dash cams, so I can have one forward and one rear.