Intelbras VIP 3430 B G2, Руководство пользователя

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4.2. Video
In this menu you can make video settings. The device has two streams or viewing planes. The Main Stream is always
enabled, while the Extra Stream can be disabled.
Video
» Compression type: there are four options: H.264, H264B, H.265 and Smart Compression (H.265+). H.264B uses a
lower compression level compared to H.264. Smart compression is more efficient than H.264 because, at scale, it requires
fewer bits for a sharper image.
H.265+ is a variant of H.265 that lowers the bit rate even further while maintaining the
image´s quality.
Note: using H.265+ limits some functions (most of the Video Analysis, UDP and Multicast) and requires the device to
reboot.
» Resolution: The camera has the following resolution settings:
Main stream resolution
Note: see MHDX 1108 recorder restriction in section 9. Frequently Asked Questions.
» Frame rate: is the amount of images per second (1~30). When increasing the frame rate, it is necessary to increase the
bit rate as well, in order to maintain the same quality in the video.
» Bit rate type: there are two options: CBR and VBR.
» CBR: uses a constant bit rate all the time. However, at times of little movement the image quality could still be the
same with a lower bit rate. With CBR it is easy to predict the required storage size.
» VBR: uses variable bit rate, optimizing space use. Allows greater space utilization at times of need, reducing the
bitrate to a minimum at times of low traffic.
» Bit Rate Range: displays the minimum and maximum rates to be used, based on the selected Compression Type,
Resolution, Frame Rate, and I-Frame Interval.
» Bit rate: determines the value when the bit rate type is CBR.
Note:
the bit rate values must respect the minimum and maximum values of their reference.
» I-Frame interval: I-Frame is a frame in the video that has a larger size than the others. The smaller the number of
I-Frames, the lower the bitrate, but as a consequence a video that has fast movements (a car at high speed, for example)
may be shown with poor quality. The smaller the value, the more I-Frames will be sent.