User manual

Nero Recode Manual
31
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Note: The higher the required aspect ratio, the higher the needed bit rate.
Therefore, parts of the quality slider may be grayed out, if the required aspect
ratio would result in a bit rate which is not supported by the selected encoder
or technically impossible.
Only available when the check box Fit to target is cleared.
Input field
Video bit
rate
Displays the bit rate of the output in Kbps. The bit rate is the quantity of data
transmitted within a time unit.
The value is determined by the output settings you have selected and is
updated in real-time to any made change.
Drop-down
menu
Bit rate
mode
Defines what kind of bit rate the audio codec is using.
Constant bit rate (CBR): Specifies a constant bit rate, i.e., the data flow per
unit of time and thus the quantity of the saved data is the same over the
entire audio file.
Variable bit rate (VBR): Specifies a variable bit rate, i.e., the data flow per
unit of time and thus the quantity of the saved data adapts to the dynamics
of the audio file. The bit rate, for example, can be lowered at quieter points in
the track.
Average bit rate (ABR): Specifies an average bit rate, i.e., the data flow per
unit of time and thus the quantity of the saved data adapts to the dynamics
of the audio file but the average bit rate tends to the defined value. In
principle is it a variable bit rate with a limited bit band width and thus
combining the advantages of the variable and the constant bit rate.