Reg: Bitrates support 576kbps in ogg vorbis

[Emima]

Hi,



I was checking for bit rates support above 500kbps in the libvorbis code, so
I tried to encode ogg files with bitrate 576kbps but the encoder OggdropXpd
gives maximum bit rate of only 500kbps. Does the Vorbis audio support bit
rate 576 kbps?



Thanks,

Emima

[x***@xiph.org]

> I was checking for bit rates support above 500kbps in the libvorbis code, so
> I tried to encode ogg files with bitrate 576kbps but the encoder OggdropXpd
> gives maximum bit rate of only 500kbps. Does the Vorbis audio support bit
> rate 576 kbps?

Vorbis itself has no real concept of bitrate, and so it has no limits.
Our specific encoders are not tuned for and do not offer bitrates
over 500kbps (for stereo CD-rate in any case), because that's the
point where it's becoming silly to use a lossy codec; you'd probably
be better off going with FLAC or a lossless codec.

Monty

[Sergei Steshenko]

--- On Thu, 12/10/09, ***@xiph.org <***@xiph.org> wrote:

> From: ***@xiph.org <***@xiph.org>
> Subject: Re: [Vorbis] Reg: Bitrates support 576kbps in ogg vorbis
> To: "Emima" <***@jasmin-infotech.com>
> Cc: ***@xiph.org
> Date: Thursday, December 10, 2009, 9:27 AM
> > I was checking for bit rates
> support above 500kbps in the libvorbis code, so
> > I tried to encode ogg files with bitrate 576kbps but
> the encoder OggdropXpd
> > gives maximum bit rate of only 500kbps. Does the
> Vorbis audio support bit
> > rate 576 kbps?
>
> Vorbis itself has no real concept of bitrate, and so it has
> no limits.
> Our specific encoders are not tuned for and do not offer
> bitrates
> over 500kbps (for stereo CD-rate in any case), because
> that's the
> point where it's becoming silly to use a lossy codec; you'd
> probably
> be better off going with FLAC or a lossless codec.
>
> Monty
> _______________________________________________
> Vorbis mailing list
> ***@xiph.org
> http://lists.xiph.org/mailman/listinfo/vorbis
>

Well, CD audio stereo has rate of 1411200 bits/sec, FLAC and similar will
typically cut it by half, i.e. at best it'll be 700 Kbits/sec, so there is
some room for Vorbis yet :).

Regards,
Sergei.

[Ulrich Windl]

On 10 Dec 2009 at 12:27, ***@xiph.org wrote:

> > I was checking for bit rates support above 500kbps in the libvorbis code, so
> > I tried to encode ogg files with bitrate 576kbps but the encoder OggdropXpd
> > gives maximum bit rate of only 500kbps. Does the Vorbis audio support bit
> > rate 576 kbps?
>
> Vorbis itself has no real concept of bitrate, and so it has no limits.
> Our specific encoders are not tuned for and do not offer bitrates
> over 500kbps (for stereo CD-rate in any case), because that's the
> point where it's becoming silly to use a lossy codec; you'd probably
> be better off going with FLAC or a lossless codec.

I can only say that there is CD audio where bitrates up to 320kB/s (BVR peaks)
make sense. The problem with FLAC is that even fewer devices support it than for
Vorbis.

Ulrich


>
> Monty
> _______________________________________________
> Vorbis mailing list
> ***@xiph.org
> http://lists.xiph.org/mailman/listinfo/vorbis

[Ulrich Windl]

On 11 Dec 2009 at 8:38, Ulrich Windl wrote:

[...]
> I can only say that there is CD audio where bitrates up to 320kB/s (BVR peaks)

of course I meant "VBR peaks". Sorry!

> make sense. The problem with FLAC is that even fewer devices support it than for
> Vorbis.
>
> Ulrich
>
>
> >
> > Monty
> > _______________________________________________
> > Vorbis mailing list
> > ***@xiph.org
> > http://lists.xiph.org/mailman/listinfo/vorbis
>
>
> _______________________________________________
> Vorbis mailing list
> ***@xiph.org
> http://lists.xiph.org/mailman/listinfo/vorbis