[vorbis] Invalid parameters for bitrate

[JoSH Lehan]

Hi!  I'm very impressed with the progress Ogg Vorbis has made, ever since 
getting that T-shirt at LinuxWorld Expo :-)

Using oggenc, I've run into a problem, though:

"Mode initialisation failed: invalid parameters for bitrate"

This happens when 2 conditions are true: 1) the input file has a sampling 
rate less than 44100, and 2) the -M parameter is used to specify a maximum 
bitrate.

If the input file has a sampling rate of 44100, this problem does not 
happen, and I can use the -M parameter to lower the maximum bitrate all the 
way down to 4 kbps (which is almost unintelligible).

My goal is to use Ogg Vorbis to make files that have such a small bitrate 
that they can be streamed over a modem.  Under older versions of Ogg 
Vorbis, I used to be able to do the hack of lowering the sampling rate of 
my input file, until I got an output of the size I wanted.  Now, it seems I 
can't do this: even at -q 0, the size of the file seems to be too much (it 
stays at around 64 kbps, no matter what sampling rate is used).

Does anyone have a workaround that will solve this problem, and that will 
allow -M to work even when the input file is not 44100?

Thanks!
Josh (Krellan)

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