[vorbis] RE: Hlp in finding a native Ogg trim, fade & nomalise tool

[Ross Levis]

Hi John

A trimer/vcut type application is possible but unfortunately not a
fade/normaliser.  Not without decoding/encoding.  I asked about this a
couple of years ago.  Unlike MP3, the Ogg Vorbis format doesn't store a
global gain setting per frame.

I have often downloaded MP3 files from mp3.com and other sources for
broadcasting, and with the type of music I need, it is often not
normalised before encoding so I find it very useful to be able to
normalise the volume of the MP3 file without losing quality.  It is a
shame that in the future when Ogg Vorbis is the codec of choice, I'll
have to re-encode.  

Hopefully some more work can be done to reduce the artifacts from
re-encoding.

Ross Levis
WinVorbis & Vorbix v1.40 (just released)
http://winvorbis.stationplaylist.com

> > From: John K Muir <jkmuir at trentu.ca>
> > Subject: Help in finding a native Ogg trim, fade & nomalise tool
> > 
> > My specific interest lies in a project which involves the digital 
> > ingest of about 13,000 CDs, 8000 LPs and various and sundry 
> other tape 
> > and disc formats into a online intranet resource for programmers at 
> > non profit community radio facility.
> > 
> > The tests of the codec were very satisfying, and for all 
> the reasons 
> > spelled out on the http://www.vorbis.com site. We are 
> excited at the 
> > prospect of using a non-proprietary codec in our non-profit 
> > organisation.
> > 
> > Our problem is that we really want to get it as good as we can the 
> > first time around. While we do plan on keeping all the audio 
> > materials, once an item is digitised, we hope it will be a 
> long time 
> > before the original is dug up and re-encoded. And we 
> believe it would 
> > be wise for us to avoid "transcoding" if at all possible.
> > 
> > The rough outline of the plan is to use Win98SE with 
> Audiograbber and 
> > the Ogg codec system to make analogue recordings and rip the CDs .
> > 
> > The resulting ogg and associated files (meta date, such as  text & 
> > graphics) will reside on a network attached server, with 
> perhaps a SQL 
> > application running on an independent  cpu to handle searches from 
> > other workstations on the LAN.
> > 
> > The one tool which doesn't seem to exist yet for the Ogg 
> format is the 
> > equivalent of something like MP3Trim,  
> > http://www.logiccell.com/~mp3trim/
> > which provides a convenient method of trimming,  
> normalising and fading MP3 files
> > with the need to decode and reencode.  I have tried VCut, 
> but it behaved in a way
> > which I did not understand, and did not seem to work at all 
> with a Variable Bit
> > Rate
> > Ogg file.
> > 
> > I would very much appreciate finding out if there is such a 
> tool which 
> > can be used
> > 
> > like MP3Trim, or if someone is working on one.
> > 
> > I know there are number methods to trim and normalise a wav 
> file prior 
> > to it being encoded, but its would be better to be able to 
> manipulate 
> > audio once it is the ogg format as well.
> > 
> > Without this tool or some hope that some method to provide these 
> > functions will come into being in the next few months, we 
> will not be 
> > able to commit to the Ogg format.
> > 
> > Would it be any incentive to announce that we would we would make a 
> > donation
> > ($100)
> > to the Xiph.org Foundation and tell our listeners to to do 
> the same, while
> > producing and
> > airing radio programmes about the work of the foundation?
> > 
> > All the best // John
> > 
> > http://www.trentradio.ca
> > 
> > 
> --- >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.
> 
--- >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.