What Is The Dash Cam?
- Jun 19, 2018 -
What is the dash cam?
The dash cam is a device installed on a car to record the front or peripheral video and audio when the car is traveling. Commonly used wide-angle cameras, high-definition camera probes, multiple screen and video integrated dash cam, there are also need to use USB to connect the camera and the body.
|Because the car will automatically power off in the event of a collision, the corresponding driving recorder will also disconnect the power supply. This loses the meaning of the dash cam, so the dash cam needs a built-in battery to continue working. The dash cam's built-in battery uses a lithium battery and uses a standard voltage of 2.7-4.2V. In normal driving, plug in the power supply and charge it to keep the lithium battery fully charged. In general, when the video resolution is 1280*720, the front license plate can be clearly seen, and the license plate in the side lane is relatively blurred. In addition, whether the recorder has a CMOS with good photosensitivity is directly related to the effect of its night shooting.|
Most of the dash cams use the H.264 compression format. Without a good compression method, not only does it mean occupying more storage capacity, but also has a higher requirement for the speed of the memory card. Otherwise, it is easy to drop frames and affect the compatibility of the memory card. The 1-minute clip size for H.264 compression at 720P resolution is approximately 60MB. For the owner, a reasonable choice of recording interval and capacity is helpful for the timely collection of evidence in the event of an accident. In general, it is appropriate to select 1 minute as the interval.