User Manual

 Rate Control

The rate control setting determines the bit rate and quality of each frame in the video stream.

 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.

Adjust the CBR Bit Rate slider that appears when CBR is selected to the optimal fixed number of bits per second.

 CVBR: The constrained variable bit rate (CVBR) provides high-quality video and long recording time of variable bit

rate while limiting variations in recording capacity consumption. Adjust the Maximum Bit Rate slider that appears

when CVBR is selected to the optimal bit rate for your configuration.

 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, 20, 16.67, 15, 12.5, 12, 10, 7.5, 5, 3, 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.

 GOP Length

Select the GOP Length from 1 to 60. The upper limit depends on the selected image rate. Recovery of the lost frames will

be more difficult as the value gets bigger. Smaller values will increase the bit rate and network bandwidth demands. This

setting is only available with H264.

 QoS (DSCP) Codepoint

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.

NOTES:

1. If you are not familiar with DSCP, contact your network administrator before changing this setting.

2. Your network must be configured to use QoS. If you are unsure if your network is QoS-aware, contact your network

administrator.

 Profile

The profile defines the subset of bit stream features in an H.264 stream, including color reproduction and additional video

compression. It is important that the selected profile is compatible with the recording device so that a stream can be

decoded and viewed.

1. Main: An intermediate profile with a medium compression ratio. Main is the default profile setting. This profile is

compatible with most recorders and uses fewer bits to compress video than the baseline profile; however, it uses

more bits than the high profile. The main profile supports I-frames, P-frames, and B-frames.

2. High: A complex profile with a high compression ratio. This is the primary profile for high-definition television

applications; for example this is the profile adopted for Blu-ray and HD-DVD. The high profile supports I-frames,

P-frames, and B-frames.

Secondary Stream

Select Custom in Select Preset and configure Secondary Stream. Repeat Primary Stream setting steps for the Secondary

Stream settings.