[vorbis] How to fit Oggs in a specific amount of space?

[Alejandro G. Belluscio]

Hello Martin,
  I would try to run them through rehuff. You usually get a 10%
  reduction in file size without loosing any quality. The reason is
  that for encoding vorbis uses some Huffman codes. But since the
  codes must go in the header and the encoder doesn't knows what the
  output will be untill it finishes the file, vorbisenc uses some
  fixed codes that have an almost unmeasurable probability of being
  optimal. Rehuff simply reads the data, computes the optimal codes
  and resave the data using the new codes. Note that this is a
  looseless process.
  BTW, Seher, have you keep polishing rehuff? Will Xiph use it as an
  option for vorbisenc?

Best regards,
Alejandro Belluscio

Monday, October 21, 2002, 8:13:05 PM, you wrote:

MF>         I took 5 albums (Classical music) and converted them to Ogg Vorbis 
MF> at "Full Bitrate" (-q10) and all 5 directories take up about 775 Megs 
MF> which won't fit on a CD.  So I ripped them again in WAV first (And 
MF> give my friend back his CDs) but now I wanna know what quality 
MF> setting should I use to fit them on 1 CD (The highest possible with 
MF> total space used just under 700 Megs)

MF>         Is there a tool available that will analyse WAV files and determine 
MF> the "Nominal Deviation Factor" or something like that to figure out 
MF> what quality setting I need to use to fit them in a specific amount 
MF> of space.  Is this even consistant?  By that I mean if a certain song 
MF> encoded at q4 (128k nom.) gets an average of 120kbps does that mean 
MF> the same song encoded at q8 (256k nom.) will get an average of 
MF> 250kbps?  Or if it's not linear is there a way to predict the q 
MF> setting to use.

MF>         So for files that take up 775 Megs @ q10 to fit in 700 Megs I need 
MF> to use what?  q9?  q9.5?  q9.7?  q9.8?

MF>         There has to be a faster way than trial and error...

<p>--- >8 ----
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