[MPlayer-users] Re: Encoding with ogg/vorbis

[gabor]

actually maybe he want's to reduce the file size

i did the same.. i had a file with 128 or 96 kb/s mp3 and transcoded it
into 64 kb/s ogg files ( -q 0?).

so if you want to reencode the audio into ogg, do the following:

what you need?:
mplayer
vorbis-tools ( to encode ogg )
mpg123 ( to decode mp3 )
ogmtools ( to create the ogm file )
http://www.bunkus.org/videotools/ogmtools/



1.extract the audio:
	mplayer -dumpaudio -dumpfile audio.mp3 myfile.avi
  this will extract the mp3 audio.
2. reencode it into ogg:
	mpg123 -s audio.mp3 | oggenc -r -q 0 - -o audio.ogg

	that basically decodes the mp3 to stdout and encodes into ogg.... look
into man oggenc for more info ( the '-' standing 'alone' is not a typo!
it means that oggenc should read from stdin )

3. create the ogm file:
	ogmmerge myfile.avi audio.ogg -o newfile.ogm

4. you're finished :-)

ogmmerge doesn't know how to merge mp3 data into ogm, so he'll simply
ignore the mp3 audio in myfile.avi ... perharps in the future you'll
need to specify that you don't want the mp3 from the avi..

bye,
gabor	

On Thu, 2002-08-08 at 12:31, ChristianHJW wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> 
> "Fabrice DELENTE" <fabrice.delente at free.fr> schrieb im Newsbeitrag
> news:20020808175932.A9345 at smtp.free.fr...
> > I planned to do it that way: extract the audio from the avi file in mp3
> > format, then reencode it in ogg/vorbis, then put back the reencoding the
> > whole file, supplying it the ogg/vorbis audio with the -audiofile switch.
> 
> 
> Dont reencode the MP3 audio to Vorbis, the quality can only be worse, never
> better. If you want to use Ogg as container simply use the existing MP3
> audio stream, means you will 'transmux' the AVI content into an Ogg
> container.
> 
> Christian
> 
> 
> 
> 
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