Manual Niagara B264 Standalone Encoder (page 37 of 120) (English)

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 Video Bit Rate: This field is shown only if the encoder is set to CBR mode and the Bit

Rate Selection control is set to Video Bit Rate. It determines the video elementary

stream bit rate, expressed in bits/second. Note that the bit rate resolution is

1000 bits/second.

 Transport Bit Rate: This field is shown only if the encoder is set to CBR mode and the

Bit Rate Selection control is set to Transport Bit Rate. It determines the overall

transport stream bit rate, with a resolution of 1000 bits/sec; the encoder will calculate the

appropriate video bit rate the yield the desired transport rate. Please note that all

transport rates are achievable; in particular, the encoder may not be able to achieve very

low transport rates if the audio bit rates are high. In these cases, the actual transport rate

output by the encoder will be higher than the configured value. The actual transport rate

is displayed in the Encoder Statistics Tab, after the Apply button has been pressed. At

that point, the actual encoder video bit rate can be found in the Encoder Statistics Tab,

under the Basic bottom tab.

 Peak Video Bit Rate, Average Video Bit Rate: These two fields are shown only if the

encoder is set to VBR mode, and determine the desired average and acceptable peak bit

rates for the video elementary stream. The peak video bit rate must be between 1.5 and 2

times the average bit rate; the user interface will enforce these limits automatically (i.e., it

will update either the average or peak to be consistent with the value being entered). For

both of these parameters, the resolution is 1000 bits/sec.

Basic Tab – Audio Configuration

 Audio Source: This parameter selects the audio source. The options are Analog Audio,

directing the encoder will to use the analog right/left audio channels connected to the

selected rear I/O panel, and SDI Embedded Audio, directing the encoder to extract

embedded audio from the SDI input. If the video Input Source (see Basic Tab – Video

Configuration) is set to Composite, this parameter is grayed out and forced to Analog

Audio. It will be selectable only if the video input source is one of the SDI variations, or

if Video Input Settings is set to Auto Detected. Please note that if the encoder is set to

auto-detect the video input, and it detects a composite signal, the audio selection will fall

back to analog audio regardless of the Audio Source settings. When SDI Embedded

Audio is selected, additional configuration options become available, as shown below.

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Niagara B264 Standalone Encoder Manual

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