opus - Mar 2013 - CVBR (constrained variable bitrate)

Hi,

 

  When I use the encode tool with the -vbr switch OR the -cvbr switch I do
not see any change in the file size.  There is no difference in file size
between the above 2 options when I specify a bitrate using the -bitrate
option either.

 

  My question is when I enter a bitrate it does a good job of meeting my
request, so what is the purpose of the -cvbr switch ?  What does it do that
simply specifying a bitrate target will not do ?  How is "constrained"
variable bitrate encoding implemented in Opus ?

 

Thanks,

Phil

 

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