Grass Valley ProCoder 3 - Manual (Page 174)

174
ProCoder 3
Audio-Basic
Multi Bitrate Streams
Click the ... button to display the Audio Stream Properties dialog where you can view
the currently selected streams, add new streams, rename streams or remove streams.
Select Audio Stream
If more than one stream is defined, select the stream to view or modify from the drop-
down list. The Audio-Basic and Audio-Advanced sections will change to reflect the
selected stream.
Encoder
Select the audio encoder to use from the drop-down list.
Bitrate Mode
Select the bitrate control mode from the drop-down list.
CBR Selects constant bitrate mode. The bitrate will correspond to the
Audio Bitrate(kbps) setting. CBR mode is most useful for streaming.
Quality Based VBR Selects Quality Based Variable Bitrate mode. The bitrate will vary
in order to maintain the quality specified in the VBR Quality setting.
Constrained VBR Selects Constrained variable bitrate mode. Constrained VBR mode
varies the bitrate up to the Maximum Bitrate(kbps) setting in order
to maintain audio quality.
Unconstrained VBR Selects Unconstrained variable bitrate mode. Unconstrained VBR
mode varies the bitrate to maintain the selected audio quality
without a maximum bitrate limit.
Number of Passes
Select the number of passes to use for encoding from the drop-down list. 2-pass
encoding provides better quality but takes longer to encode.
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