[vorbis-dev] ogg123 streaming bug - cont.

[Stan Seibert]

Christoph Rupp wrote:

> Dear list,
>
> a few weeks ago there was a short thread about ogg123 starting to 
> stutter (http://www.xiph.org/archives/vorbis/200403/0043.html) and 
> making static noise after streaming music for more than 3.5 hours. I 
> have a similar problem; i used ices-2.0 to stream a playlist, and 
> after a couple of hours (sometimes just one hour, sometimes 5 to 8 
> hours) i get noise or stutter.
>
> Now one thing i have discovered is that the input buffer of ogg123 
> starts dropping, and after some hours it drops below 1% to 5%,  and 
> then the music gets interrupted. So maybe the sleeping period in 
> libshout's shout_sync() is too short?

<p>Actually, this reminds me of a question I've always had:  How do (if at 
all) streaming servers deal with clock drift between the audio source 
and the audio client?  Given enough time, that would lead to buffer 
under/overfills.  I've assumed they just ignore it since for normal 
listening durations the effect would be negligible.  With a 64 kB buffer 
fill on the client, you need to drift something on the order of 10 
seconds before the problem shows up.  I don't know anything about the 
quality of sound card oscillators, so I can't comment how long it would 
take to achieve this in practice.

Is there something about the rate control that makes this a non-issue?


---
Stan Seibert

--- >8 ----
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