What kind of body camera is good?
Body camera is also called Body camera or Body camera on the spot. It integrates digital technology photography, digital technology photography, and intercom system transmitter. It can intelligently record dynamic and static data on the spot in the whole process of inspection, which is conducive to inspection application in various natural environments. In addition, the application field of intelligent body camera that can carry out 4G wireless video transmission is more common, and it is widely used in various outdoor inspection sites and other situations that must be immediately communicated.
How to choose the right body camera? It can be referred to from many regions:
Assembly line method
The assembly line method of body camera is generally fixed on the personnel on duty. At present, there are crocodile clips, magnetic field back clips, shoulder clips and other spare parts on the market, in which the magnetic field back clips are more secure and generally can not be pulled out.
Total number of surveillance cameras
Body camera usually has people order single shot, double shot and three shot. Among them, three surveillance cameras are more omnidirectional, and one front camera is used for self photography and cooperation; One main camera is used to record video and one auxiliary camera is used to take photos. This scenario is applicable to the background management. In the case of instant video monitoring, recording can be enabled.
Appearance specification
The standard is also the mini type. The advantages of the mini type depend on its lightness. The disadvantages are also very obvious. The battery power is small. For shutdown, if there is long-term continuous application, consider the detachable rechargeable battery
Display Size
1.5 inch, 2.0 inch, 2.4 inch, no display screen, etc. Generally, 2.4 is a mainstream product, which can be touched, depending on the application scenario
Memory space
Generally, the body camera does not have embedded running memory, which needs to be expanded by the memory card. In case of MicroSD card expansion or SD card expansion, the volume is 8G, 16G, 32G, 64G, 128G; It can meet customers' needs for greater video storage. The larger the operating memory is, the higher the price of the body camera will naturally be. Generally, it is necessary to decide how much operating memory is appropriate according to the image quality of the body camera and the record storage of the monitoring camera. The ultra clear body camera has 720p and 1080p, and the 16G card record 720p video can only be recorded for 4 hours, 1080p video occupies nearly twice as much indoor space as 720p video. There are also storage cards that generally need to choose the high-speed card class10, otherwise the video recording will be terminated.
Video resolution and file format
The resolution and frame flow rate of the audio file is a key indicator value to consider the image quality of the body camera. The sales market of the body camera can be divided into four key categories: ordinary definition, ultra clear, high-definition and high-definition. The ultra clear body camera has 720p@30FPS 、 720p@60FPS 、 1080p@30FPS 、 1080p@60FPS Yes, HD 1296P@30FPS 。 The file format suitable for H.265 is better than H.264. Under the same picture quality, H.265 occupies less indoor space. Naturally, the service platform must be suitable for H.265 file format analysis before it can be broadcast. Some consumer players on computers are not compatible with H.265 analysis.
Shooting technique
Generally, there are several shooting methods, most of which are adjusted according to the angle of view of the surveillance camera: 90 degrees, 100 degrees, 120 degrees, 140 degrees, 150 degrees, 170 degrees, etc. Body cameras of mainstream products are equipped with 120 degree or 140 degree ultra wide angle lenses. A single wide-angle lens can not reach 170 degrees. Even if the 170 degree interface is achieved, it will be severely deformed, which will harm the clarity of the interface.
Video definition
According to the definition division, there are four types of body cameras: 300000 definition, 1.3 million definition, 2 million definition, and 5 million definition. Some of them indicate that 12 million, 36 million, and 48 million definition refer to static data photography, not video definition values.
Summary: The shooting method of the surveillance camera should be larger, which is beneficial to the all-around recording of nearby conditions. However, it should be noted that the angle of view of the wide-angle lens should not be too grandiose, in case the interface shown is distorted.
Body camera should have good shooting picture quality and the ability to shoot at night. The high pixel is determined by the main control chip of the body camera. In this case, the car buyer must be concerned about the image processing plan of the main control chip of the body camera. In other words, the body camera must have enough storage space to keep a reasonable long-term camera.
The file formats of image processors of mainstream products are MOV, avi, H 264 file format. If the body camera fails to reach 30 frames per second, the video will be jammed in the 1080P shooting mode. In the 720P shooting mode, at least 24 frames per second that the human eye can blend into must be achieved to see the smooth and clear video interface.
According to the requirements of the Body Camera of the National Compulsory Certification Quality Center, all products must pass the 3C verification before they can be sold in the market. Therefore, when selecting famous brands, store buyers must be careful to select them, and 3C verification is available to ensure safety.
