The name "4K resolution" refers to a horizontal resolution of approximately 4,000 pixels. It has been developed into a variety of standards. The DCI 4K resolution standard (4096 * 2160 pixels) is widely respected by the film and video production industry. Besides, UHDTV standard (3840 * 2160 pixels) is also popular which has twice the horizontal and vertical resolution of 1080p (as shown in the figure below)
IR-CUT was stuck and didn’t switch back, or the cable was connected against, please unplug the power supply and reboot the camera. For the simple models, you can change the cable by youself. But if it is complicated model, please return the item for repair.
Adjusting the size of video frame,encode,quality and max bitrate. In main menu>setup>record>record bitrate . By decreasing the smoothing index,the frame size is increased and the image is clearer. While increasing the smoothing index, the size of frame would be decreased and would get close to frame size. And the image looks smoother. The smoothing index can be used to adjust the stream bandwidth. The adjustable range is 1-25 and the default value is 25.
In order to solve the problems including white image and defocus in the daylight, ICR camera uses two filters. One is used to filter out infrared light during the daylight and another is for filtering out visible light at night. When the illuminance is lower than the threshold set in the OSD menu, the camera will automatically switch to the other filter. However, the ordinary camera uses the same filter all day long.
Focus adjusting for bullet camera: open the cover on bullet camera, and unscrew the lens’s cover, where beneath the lens a small screw can be adjusted. Note that for product model which represents motorized zoom lenses, focus can be adjusted on PTZ control panel in IE browser.