jwc
Active Member
- Joined
- Oct 25, 2013
- Messages
- 148
- Reaction score
- 25
- Location
- near Toronto
- Country
- Canada
- Dash Cam
- X6, two G1Ws
Motion detection and continuous recording are totally different and mutually discrete functions.I bought this unit from estore009 and I'm not sure if I have a defective unit or I'm missing something. If I turn on motion detector, the default 3-min loop recording will always cut off around 5-15secs. I have to turn off the motion sensor for the recording to function properly. Another problem, the G-sensor does not work. I tried turning on the setting high and it will not record upon any shock vibration. I tested with another unit (I purchased two) and it seems to work flawlessly. Does this sound like a defective unit or am I missing something?
Continuous recording records even if there is no change in the images (motion) over time.
Motion detection means that when the processor compares images over a (very) short time period (usually about 2 seconds), the images are significantly different. If you use this when driving, the far away, tiny images of cars are not significant enough to trigger recording, but, as they get closer, they are bigger and therefore significant. It all depends on the % difference in pixels between two images. (I know this from my home security system which has a setting to vary the % difference that will trigger the alerts, so that a small animal (a cat?) WILL NOT trigger, a much bigger car or person WILL trigger. Also, an event will be triggered when the 'sunny' image changes rapidly to a 'cloudy' image in a short time even when there's no person or car around.)
The change over time is also important, if you have a car or bicycle going past very quickly, there may not be enough images to compare 'over time'. If a car passes by at 80KPH, I'm lucky to see the back end, in fact the 'capture/recording' may not occur at all. However, this also makes sense, the purpose of motion detection is to record cars or people moving relatively slowly around your car that may be about to break into or hit your car in a parking lot, not someone simply passing at great speed.
To test the G-Force, dismount the camera, shake it and watch the screen as it starts to record a NEW file, that will be limited to about 8-10 seconds, to make it easy to find and review. (and to not take up a lot of 'locked space' on your card.) My X6 is set to 8 seconds, but if I keep shaking it, it will create multiple 8 second files. This makes sense because in a crash, it's all over in a few seconds. That locked file will help you find the continuous recording just prior based on the time stamp, etc. to see what led up to the crash and the continuous recording that resumes after the crash, etc. so you can see the aftermath in all it's gory glory .
J
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