[x264-devel] VBV Encoding Questions

[Horacio Sanson]

I have been reading around about the VBV econding in x264 but still I have 
troubles digesting how it works:

If I set --vbv-maxrate/--vbv-bufsize in combination with --crf then x264 will 
vary the crf value to adjust to vbv settings (correct?). 

In the case I set --vbv-maxrate/--vbv-bufsize in combination with --bitrate 
(CBR encode) will x264 also change the bitrate setting to adjust to the vbv 
ones? If so then is it better to keep bitrate equal to vbv-maxrate? Or are 
there any situations were different bitrate and vbv-maxrate values are best?

Aren't H.264 levels defined to limit exactly the same things that vbv-maxrate 
and vbv-bufsize do? If I set --level 31 in x264 will it ignore the vbv options 
or do the vbv options take precedence?
  
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regards,                                                                                                                                                                                                       
Horacio Sanson