[Icecast] theora streaming problem...

Karl Heyes karl at xiph.org
Mon Feb 21 14:35:22 PST 2005

On Mon, 2005-02-21 at 22:04, Joern Nettingsmeier wrote:
> hi everyone!
> i'm playing around with theora streaming for the linux audio conference 
> 2005 (http://lac.zkm.de).


> i checked out svn.xiph.org/trunk, built all ogg, vorbis, speex and 
> theora related libs from scratch, then pulled icecast-2.2.0.

> three issues:
> [1]
> icecast runs fine as always, but when i do
> cat myvideo.ogg | oggfwd myhost 8000 mypasswd /test.ogg, the stream dies 
> after a few seconds. (the icecast log is appended below.)
> the same command sequence with an ogg vorbis audio file instead of the 
> theora video works without problems.

that would indicate libshout timing thing, make sure it's using the
right libshout. After a quick check, it looks like libshout 2.1 will be

> [2]
> i tried to follow oddsock's howto at 
> http://www.oddsock.org/guides/video.php, but ezstream does not compile 
> for me. it bails out with
> probably something obvious, but i could not find where SHOUT_FORMAT_OGG 
> is defined... libshout is installed, and it's not in there.

you probably have libshout 2.0 installed

> [3]
> when i transcode an mpeg2 file to theora, it's barely faster than 
> realtime on an athlon64 4000+. is this to be expected, or did i forget 
> some optimizations? here's the ffmpeg output, so that you can see the 
> stream properties.

AFAIK the theora lib is not optimised yet, there is some work going on
in the theora-mmx branch to improve that but check that you have a
recent gcc producing code for athlon 64 as well.


More information about the Icecast mailing list