[vorbis-dev] Patch for bitrate information in ogginfo

[Michael Smith]

At 04:19 PM 7/30/01 +0300, you wrote:
>On Sun, 29 Jul 2001 volsung at asu.edu wrote:
>
>> If so, I'm going to modify the patch to say "bitrate_upper=none" and
>> "bitrate_lower=none" if these values are set to -1.  Hopefully, this will
>> prevent confusion.
>>
>IIRC, the nominal bitrate can be unset too.  This means it is the default
>of the specific encoder (libvorbis) version.  The default has changed from
>160 to 128 and will probably go down with channel coupling.  This means
>that files with all 3 fields unset provide no useful information.
>Wouldn't it be better if libvorbis filled the nominal field with the
>default used?  The spec will still allow files with all fields unset but
>less such files will be created.

Actually, oggenc sets the default here to 128 kbps. libvorbis (libvorbisenc,
actually) does not - if you don't specify a bitrate to oggenc, oggenc will
explicitly give a bitrate (128k) to libvorbisenc. If you explicitly specified
-1 as the bitrate, this would be mapped to mode AA (which is less than 128 
kbps). I doubt people do that, though, and I imagine they have their reasons
if they do ;)

Michael

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