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AVAILABLE CAMERA RESOLUTION
Available camera resolutions depend on the capabilities of the cameras that are attached to the encoder. Refer to the documentation that
accompanied the cameras for more information on camera resolution.
IMAGE RATE
The image rate is the number of images per second (ips) available for the video stream configuration. Available image rates are 30, 25, 24, 15,
12.5, 12, 10, 8, 7.5, 6, 5, 4, 3, 2.5, 2, and 1.
NOTE: The maximum image rate setting might not be obtainable due to the programmed compression standard and the resolution of the stream.
BIT RATE
The bit rate is the quality of the video stream (rendered in kilobits per second). The higher the value, the higher the video quality and bandwidth
required.
NOTE: When you change any of the video stream configuration settings, the encoder automatically adjusts the bit rate. If you manually reduce
the bit rate lower than the encoder’s automatic setting, the image quality might be reduced and the stream selection options might be limited.
I-FRAME INTERVAL
The I-frame interval 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 I-frame
interval increases, the number of partial frames increases between full frames. Higher values are only recommended on networks with high
reliability. This setting is only available with H.264.
QUALITY OF SERVICE FOR DIFFERENTIATED SERVICES CODE POINT
Quality of Service (QoS) for Differentiated Services Code Point (DSCP) is a code that allows the network to prioritize the transmission of different
types of data. This setting is only available with H.264.
NOTES:
• If you are not familiar with DSCP, contact your network administrator before changing this setting.
• Your network must be configured to use QoS. If you are unsure if your network is QoS-aware, contact your network administrator.
ENDURA SIGNING
Enabling the Endura Signing feature allows an Endura
®
system to authenticate video from an Endura recorded stream. This setting is only
available with H.264.
RATE CONTROL
The rate control setting determines the bit rate and quality of each frame in the video stream. There might be a trade-off between image quality
and the resources required for video storage when selecting a rate control setting.
CBR: The constant bit rate (CBR) streams video at a fixed number of bits per second. CBR uses the full capacity of the bit rate setting for scenes
with or without motion. Video is always streamed at the user bit rate setting.