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Position: Home > Article Information > Hardware World > Analysis of Common Knowledge and Frequently Asked Questions of Free Drive Computer Cameras
Common sense and FAQ analysis of drive-free computer camera

Release time: 2016-11-24

Source: finishing

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Drive-free camera refers to a camera product that complies with the USB Video Class (UVC) standard protocol. At present, WinXP SP2 and above operating systems already support the UVC protocol. As long as a standard-compliant camera is connected to these operating systems, the system will automatically install drivers and set them for the camera to achieve true plug-and-play.
You think about it the other way. The so-called drive-free is drive-free under WINXP SP2. Others, such as WIN2K or WINXP SP1, do not have a drive. You need to install the drive when using drive-free cameras under these operating systems.
Advantages of the drive-free camera: In terms of compatibility, since the drive-free camera is designed in strict accordance with the UVC standard formulated by the USB organization, the operating system is directly "docked", and the compatibility and stability are optimized. The ordinary camera driver needs to write a third-party program to the system to support the camera hardware, which brings the use risk to the system to a certain extent (such as causing blue screens, crashes, etc.). In addition, the new generation of driverless camera chip design is more mature, which brings extremely low CPU usage. In sharp contrast to the CPU usage of more than 50% of ordinary cameras, the drive-free camera only uses about 10% of the CPU resources when used, which makes the system run more smoothly and improve the use efficiency.

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Drive-free camera CPU usage



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CPU usage of common camera

Here are some common sense in practical use of drive-free cameras:


First, the requirements of the drive-free camera on the computer operating system:
First of all, we must realize that any driver-free camera can not be plug-and-play under all operating systems: the test version of the Windows 7 operating system fully supports the driver-free camera; the full version of Windows XP SP2 / Vista operating system fully supports the driver-free camera. Drive the camera, plug and play; For the simplified version of Windows XP SP2 / Vista operating system, you may need to install operating system patches to enable plug-and-play cameras without driver; Windows XP SP1 / 2000 operating system, you must install the relevant patch software. Able to achieve drive-free plug and play; old antique machines of Windows 98 / Me operating system, can not use the driveless camera.


Second, the use of driver-free camera requirements for computer hardware:
The CPU frequency is required to be above 700MHz, the free space of the hard disk must be 600M, and the memory capacity must be 256M. The first two requirements are generally met by computers. The key is the memory capacity. Some antique computers can not reach it. During use, video jams, black screens, or no video can be produced. At this time, you should upgrade the memory.


Third, some driver-free cameras donated software. Warm reminders before installing these included software: In order to ensure the normal use of additional functions, before installing the camera special effects software, please make sure: whether Rising, Norton, Jiangmin, Anti- virus software such as Trend, Kingsoft, Kaspersky, etc. may have enabled the built-in firewall function of XP. If it is already installed or turned on, please close or quit it all before installing the driver; whether there are any other camera drivers installed in the machine. If so, it is recommended to uninstall the driver and restart before installing this camera driver. Install the software after inserting the camera.


Fourth, Direct X version problem: It is recommended to install the highest version of Direct X that the operating system in the machine can support in order to obtain good video effects, which is basically not a problem.


V. Computer USB interface problems: The driver-free camera product has the best video quality on a computer that supports USB2.0 interface, followed by USB1.1. New machines and new motherboards are generally 2.0 speed interfaces. Please note in the motherboard BIOS settings Setting of related options; when the camera cable is plugged into the computer's USB interface, if the system prompt "This device can improve performance" appears in the lower right corner of the desktop, the computer's USB interface is 1.1. It is recommended to upgrade to USB2.0 interface for better video quality. Special Note: It is recommended that you plug the camera cable into the USB interface on the back of the host box, so as to avoid the failure to identify the camera or unstable performance due to the long data cable connection and the quality of the front USB interface. This is the main cause of problems with most driverless cameras.

Problems related to driverless camera


1. With the camera plugged in, how can I see my local video effect? Does it have to be in QQ video?
Do not have to open QQ video. First open "My Computer" to see if there is a ticket for the camera logo, double-click to open it; if not, just install any video tool such as VP-EYE and you can use these software to see the local video effect.


2. Why the image is upside down when the driverless camera is turned on?
Cause: The camera sensor chip is upside down. Although the camera is facing up, the lens has been rotated by 180 degrees, and it only needs to be rotated. The camera program may conflict with some software in the computer, such as the video storm playback software installed in the computer.


3. After the camera is installed, it can be used in other programs to see the local image, but it cannot be used in QQ video. Why?
Possible reasons: 1. The video preview cannot be viewed synchronously with the network. You can only see the preview of the QQ video when the local video is closed, and vice versa. If the QQ video cannot be previewed by itself, please refer to the QQ video settings. The corresponding video equipment is not selected in the QQ video settings. You can choose it according to the actual situation. There is an inverted black triangle on the right side of the QQ video preview. For video device options, change "Disable" to USB video device.


4. Why is the black screen when I plug in the driverless camera and open the video software? There is no strange hardware in the hardware equipment.
The possible reasons are: the computer hardware configuration is too low, it is recommended to upgrade; the computer has storm video installed, it is recommended to delete or install the latest version.


5. What to do if the camera is blurry?
Focusing can be adjusted by manually adjusting the lens ring; the lens is dirty, just wipe it with a cotton cloth.
In summary, if the driverless camera encounters problems during installation and use, you can use the above method, first check the software, system, settings step by step, and then check the external connections, camera adjustments, etc., and the problem can be ruled out naturally. Of course, in the end, do n’t forget the trick that will never be defeated. Try another camera that can be used normally on other computers and try it on your computer; or install your camera on other computers that are using the camera to try the effect. The comparison will determine your driverless camera problem faster.

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