Dash cam is an automotive video tool that records related information such as images and sounds during the driving of the vehicle. Those who like self-driving tours can also use it to record the process of conquering difficulties and obstacles. While driving, the time, speed, and location are all recorded in the video, dash cam is the equivalent of a "black box". You can also use dash cam for parking monitoring. After installing the car dash cam, the recorded video images and sounds can be provided for evidence of traffic accidents. It is also to prevent the inevitable scams in current society. There's one thing to note that video data cannot be cropped. If cropped, you cannot provide assistance after the responsible accident occurs.
Types of Dash Cam
The common dash cams are mainly divided into two categories: portable dash cam and integrated center control dash cam. Portable dash cam has the characteristics of good concealment, easy installation, detachable and replacement, low cost, simple operation. The integrated dash cam is generally dedicated to special vehicles. This kind of dash cam is expensive and difficult to modify, but after installation, the environment inside the car can be kept beautiful. In addition, some luxury car models have been installed with the dash cam before leaving the factory.
The newest type of dash cam on the market has the 360-degree reversing image. It comes with 4 cameras that can simultaneously record and monitor the road conditions in the front, rear, left, and right directions of the vehicle. The driver can watch the 360-degree panoramic and seamlessly stitched real-time image around the car (a bird's-eye view image) through the display, and know the blind spots around the vehicle. The 360 degree dash cam has a safer and more effective parking assist system. It is completely different from the previous "panoramic" system, which only divides the surrounding 4 images of the car on the display. 360 dash cam is the latest true "panoramic reversing image system".
When purchasing a dash cam, you need to analyze the parameters, camera angle, video resolution, compression format, cache, emergency recording, anti-interference performance and whether it is equipped with a memory card.
The camera visual angle of the dash cam is mostly 100 degrees and above. 100° angle can basically ensure that the lanes on both sides of the vehicle are captured. Of course, choosing the largest possible camera angle is better for the car owner, but this also requires more money.
Generally speaking, when the video resolution is 1280*720P, it can ensure that the front license plate can be seen clearly, while the license plate of the side lane is relatively blurred. In addition, the sensitivity of the CMOS chip of the dash cam and the quality of the glass of the outside lens will directly relate to the effect of shooting at night.
Most dash cams use H.264 compression format. The lack of a good compression method not only means larger storage capacity, but also requires higher speed of the memory card, otherwise it is easy to lose frames and affect the compatibility between the memory card and dash cam. The size of a 1-minute fragment compressed by 720P resolution H.264 is about 60MB. For car owners, a reasonable choice of recording interval and capacity is helpful for timely evidence collection in the event of an accident. Generally speaking, 1 minute is appropriate as the interval.
Choosing the largest possible cache can bring smoother videos and better memory card compatibility.
Based on the characteristic of loop recording, if there is a video that is important, but the next video needs to be recorded, the previous important video will be automatically deleted. At this time, there is an emergency video recording design. If there are important images, just manually press the button, and the video will be forced to be saved and will not be automatically deleted when the card is full. While the automatic emergency video recording uses a gravity sensor. It will automatically protect this video from being automatically overwritten and deleted when it monitors the vehicle has violent vibration. This function will be very useful in the event of a vehicle collision.
In order to reduce costs, inferior products are designed without any shielding measures and without strict testing. They will interfere with GPS navigation, remote controls, radios, TPMS and trip computers and other automotive electronic products. The impact will be huge when a situation occurs.
Because the video files recorded by the dash cam are very large, the high-definition video is up to nearly 100 megabytes per minute, so there are strict requirements on the speed of writing to the memory card. The low-speed card generates a large amount of heat and the dash cam will has crash fault. It is recommended that buyers equip the original genuine CLASS6 card.