Doc # APN-24M8.29IP
Issue Date: 03/23/2020
Revision: C
Page 20 of 71
13.2.
Stream
Configures the H.264, H.265 and MJPEG setting value for stream.
Compression: Select the stream profile that is to be used for transmissions.
Resolution: Specify as the number of pixel-columns (width) by the number of pixel-rows (height).
Frame rate: Indicate the number of fps (frame per second) available for the video stream configuration.
GOP size: Describe the composition of the video stream. This GOP (Group of Picture) setting configures
the number of partial frames that occur between full frames in the video stream. For example, in a scene
where a door opens, and a person walks through, only the movements of the door and the person are
stored by the video encoder. The stationary background that occurs in the previous partial frames is not
encoded because no changes occurred in that part of the scene; the stationary background is only
encoded in the full frames. Partial frames improve video compression rates by reducing the size of the
video. As the GOP increases, the number of partial frames increases between full frames. This setting
is only available with H.264 or H.265 compression standards. The higher value saves considerably on
bandwidth but may have an adverse effect on image quality. Lower values are only recommended on
networks with high reliability. Please consult with your network administrator before changing.
Bitrate control: The bit rate can be set as VBR (Variable Bit Rate) or CBR (Constant Bit Rate).
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VBR: Automatically adjusts the bit rate according to the image complexity, using up bandwidth for
increased activity in the image, and less for lower activity in the monitored area.
CONFIDENTIAL
