[vorbis] 6 channel encoding

[Norman Urs Baier]

Exactly! Not that I could provide any answer, but I defintely would like to 
know if there is a convenient way to encode movies with Vorbis.
What encoder are you using, and which file format, and which file format, and 
which codec?

Norman

<p>Am Dienstag, 19. November 2002 13.42 schrieb Michael Smith:
> At 05:52 AM 18/11/2002 -0800, you wrote:
> >It appears that either Vorbis was never intended to support more than 2
> >channels
> >or the algorithm doesn't work for low sound levels.  In trying to encode
> >Beauty and the Beast and Starwars II using 6 channels, the Vorbis
> >encoder produced
> >noise in all the scenes were audio dropped below -25 dB.  Unfortunately
> >since most
> >dialog is below -25 dB, the Vorbis encodings are unintelligable for most
> >of the movies.  Not
> >a single dialog scene in Starwars which could be understood using Vorbis
> >encoding while the
> >end credits in Starwars and the Ballroom scene in Beauty and the Beast
> > were completely destroyed by the Vorbis encoding.  Seems long string
> > passages in 6 channels
> >have beating added by Vorbis while most of the frequencies in dialog are
> >removed.
> >These encodings were done at 768000bits/second variable bitrate.
>
> Vorbis definately works for many channels, and for very low-level
> inputs. It's been extensively tested in all sorts of situations,
> including encoding multichannel movie soundtracks.
>
> The most likely explanation is that you've hit some sort of bug in
> the software you're using to encode (not a bug in the core vorbis
> libraries).
>
> Since you neglected to say what software you were using, we can't
> give you any more specific assistance than that.
>
> Michael
>
>
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