[Vorbis] Help please streaming oggs as they are being created

[HJ]

VideoLAN(.org) can do on-demand, I believe (which would include HTTP seeking
support), and I don't think it cares if the file is growing while it's
playing or being seeked around in.

The primary consideration here would be bandwidth, and that's about it.

Give it a shot.  I'm sure the list would like to know of successes/failures.

~

--- Ralph Giles <giles at xiph.org> wrote:

> On Sun, Oct 24, 2004 at 12:30:53PM -0400, ben-extra at MIT.EDU wrote:
> 
> > Nothing does what I want.  Edna was easy to set up and use.  When I go
> > to my own edna web page, xmms opens and streams radio.ogg just fine,
> > but there is no seek control displayed, so I can't move forward in the
> > file to the current time.  However, the file does play through to the
> > end.  So if I start listening 20 minutes after a recording starts, I
> > can listen to the whole recording, but 20 minutes delayed.  I haven't
> > tested edna from Windows.
> > 
> > Using straight Apache, the entire file downloads before it starts to
> > play (no streaming) and there IS a seek control, so I can move forward
> > to the current time.  Which is good, except xmms stops playing when it
> > reaches the end of the file, even if the file has gotten larger on the
> > server.  (So if I start listening 20 minutes into the recording, I can
> > only hear 20 minutes of the recording.)
> 
> Yes. The issue here is seekability over the network. You can do this over
> http, but afaik alsaplayer is the only one that supports it. You might
> try that. I'm not sure if you'll need to set some of the no-cache headers
> for apache to keep serving the growing file or not.
> 
> Seeking over http is slow because it has to do a binary search to find
> the seek point. An obvious optimization is to do the seek on the server
> side. It's possible to write an apache extension to implement time-based
> units for the Range: headers as well as bytes (if you want a fun little
> project :). There's also an internet draft for addressing temporal
> subranges through uri fragments. You might take a look at annodex.net; 
> they have a mod_annodex that can return pre-seeked bits, but I don't know
> if it works on generic ogg files or not.
> 
> > Reading google and the xiph.org archives there seems to be a lot of
> > ideas on how to make this work, but nothing definitive.  Things I have
> > seen mentioned include:
> > 
> >   -using ices/icecast
> 
> This can replicate what you're hearing for others over the net, but 
> doesn't help anyone else do independent seeking.
> 
> >   -changing to MP3, which is better suited to seeking
> 
> Ha! This is not true. Except for the way metadata is conventionally
> done it's not much worse either, so you might as well use Vorbis.
> 
> Hope that helps,
>  -r
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