[Icecast] converting mp3's to aac+ or ogg

Chris MacDonald chris at thoughtsoft.net
Sun Jun 25 20:46:14 UTC 2006

Hey Dave,

Personally I use ezstream as a source client as it's designed to 
re-encode your stream (it's available at www.icecast.org). I've set up 
my radio to re-encode my archived flacs to ogg vorbis then out to 
icecast and it works quite well.

As for quality, vorbis is apparently one of the nicer formats at low 
bitrates. I'm not sure about aac though, I'd imagine there isn't much in 
the way of support for it so you'd be much better off with ogg. Either 
way though, re-encoding from a lossy format (mp3) to another lossy 
format (ogg/aac) you'll notice some sound degradation from your source 
mp3, this is entirely why I archive in flac.

I'm not sure what you want to do for dialup/broadband quality settings 
but I'd probably just run two mounts for each station, one low bitrate 
and one higher. One thing you have to keep in mind though is that all 
this re-encoding would happen on the fly so you need to make sure the 
machine you'd be doing it with was up to the task.

Not sure if any of the above helps, but I'd imagine it presents some 
options at least.


Dave wrote:
> Hello,
>    I've got a FreeBSD 6 machine running icecast2 and ices0streaming 
> four different streams of mp3's. Now i have a need to stream the same 
> content as either aac+ or ogg vorbis whichever would be easiest to set 
> up and give the best quality. I want these new streams to handle both 
> broadband and dialup users without sacrificing quality. My problem is 
> i really really do not want to have to manually go through my media 
> again and bring them in to aac+ or ogg, doing it once for mp3 was bad 
> enough. I used abcde to handle this, and as i said i'd like to find an 
> automated way of reworking these files. Any suggestions welcome.
> Thanks.
> Dave.
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> Icecast at xiph.org
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