[vorbis-dev] oggenc questions
dkuhlen at fhm.edu
Sun Jul 27 13:58:17 PDT 2003
Some questions concerning oggenc:
1 why is it called oggenc? (vorbisenc would make more sense)
2 Is it true, that oggenc uses only some predefined codebooks (depending on -q)?
2.1 Are they just "random" books, or were they "optimized" in any way
2.2 Is it possible, that some codebooks are stored in the header, but are never used (even in long (>3min) files)?
4 Are there any docs about the psychoacoustic model?
5 Does it compress using two passes (whole file)?
5.1 Is it necessary to use twopass to do "real" VBR (1. pass: estimate BR; 2.pass: compress)?
(ups, this is a general question about VBR)
5.2 Same applies to windowsizes: It has to check the file before choosing optimal windowsizes
Another question that has nothing to do with oggenc:
Are there any compliance test Ogg Vorbis files?
Or any boundary test files (eg:
-full dynamic range
-plenty of comments)?
<p>Thank you for any informations
<p>--- >8 ----
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