[vorbis] 22050 Hz in vorbis rc3?

Akos Maroy darkeye at tyrell.hu
Wed Mar 20 00:26:45 PST 2002



Michael Smith wrote:
> This is not with rc2 managed bitrates, such a thing doesn't exist. 
> This is equivalent to what happens using non-managed modes in rc3,
> and you should get comparable (but superior) results with rc3.

A while ago (in the times of rc2) I was experimenting with 22.05 kHz 
streams, and I remembered they worked. I was just a bit surprised that 
they don't work with rc3, as they used to with rc2.

By "as they used to", I mean calling the same functions. It may be, that 
underneath the API there is no managed bitrate in rc2, and this whole 
thing in rc3 is brand new. But on the user / programmer side, I did call 
managed bitrate functions in both cases, e.g. vorbis_encode_init(), and 
not vorbis_encode_init_vbr(). Forgive me that I thought that this call 
really does what it seems it does.

And it indeed does what it seems to do, in both rc2 and rc3. Calling 
vorbis_encode_init() with appropriate bitrates does generate approx. 
fixed bitrate output in both cases. I don't see how is this equivalent 
to using vorbis in a non-managed manner, as the whole point for me is to 
be able to specify the maximum bitrate, and this is what I have done.

I do understand that you say that VBR is much better, and that vorbis is 
VBR inside. I hope you do understand my concerns as well, in particilar 
the need to be able to produce low bitrate output.

Anyhow, all I'm looking for is a possibility to use ogg vorbis for 
streaming to modem users with 33.6 kb/s modems. Any possibility (managed 
bitrate or not, I don't care) would suit me fine. And this was my 
original question, which was left unanswered. (Should I assume "no, I 
can't" as an answer then?)

 > You've been told this more than a few times now.

With all due respect, I think my inquiry did not warrant such a rude 
response.

<p>Akos

<p>--- >8 ----
List archives:  http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to 'vorbis-request at xiph.org'
containing only the word 'unsubscribe' in the body.  No subject is needed.
Unsubscribe messages sent to the list will be ignored/filtered.



More information about the Vorbis mailing list