I have used the cameras supplied by DogCam. This is supposed to be the same equipment the UK police use as personal cameras. Not used them on the bike but in a L car when I was instructing. One viewing the inside of the car & one viewing forward. Never did have an incident when using the cameras but I'd purchased them due to the stupid things other drivers would do purely because it was a L-school car.
I'm thinking of setting one up as a helmet cam for when I do go out 'on the road'.
I was a CCTV installer for many years & in that time I proved to myself that the only way to get good pictures was to use good cameras and pay the extra. I used to install & hire covert CCTV equipment & in most cases the police would make comments of 'I wish we had this quality of image every time, often it's hard to tell if they are male or female'. Fifteen years ago I would buy a Hitachi camera costing £600 ex.VAT. A salesman offered me a (genuine) Hitachi camera (looking almost identical to the £600 one) for £120 & offered to demo it for me, I looked at the back & told him I would have them if he payed me £20 to take one. Specs were similar but picture quality of the £120 was the pits. You pay for what you get.
Specs. can be very misleading as two cameras with similar specs. can give pictures that are a mile apart in quality & it's normally the dearer and/or 'named brand' cameras that perform the best.
The recordings I did in daytime with the DogCams would display full screen on a 26" wide-screen TV & give the quality you'd expect from a digital hard-drive camcorder from the likes of Sony, JVC, Panasonic etc.
Look for a camera
that will output video at 720p or more & 30fps
is small but not tiny (yes size does matter), larger camera often have better quality of lens & lens quality is important. **** lens = **** picture.
study, well built (metal?) units. Manufactures don't normally put good guts in a cheap & nasty case. If it looks good then it probably is.
Sorry if the post is a bit long winded but from my CCTV experience YOU GET WHAT YOU PAY FOR, PAY CHEAP PRICE & YOU GET CHEAP KIT.
My advice is if you are going to get a headcam the pay the money to get a good one. Even now I'd be thinking in the region of £150 for a camera, not sure how much that is in $ but could be around $240 ($100=£60=**** CAMERA)
Here is a link to the DogCam site
http://www.dogcamsport.co.uk/