[Bug 692953] alsa modules are silent or noisy after several hours of use

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=692953
  GStreamer | gst-plugins-base | 1.0.9

--- Comment #80 from Thomas DEBESSE <thomas.debesse at rcf.fr> 2013-08-30 13:09:30 UTC ---
I found this:

<ARG>
<NAME>GstEncodeBin::audio-jitter-tolerance</NAME>
<TYPE>guint64</TYPE>
<RANGE></RANGE>
<FLAGS>rw</FLAGS>
<NICK>Audio jitter tolerance</NICK>
<BLURB>Amount of timestamp jitter/imperfection to allow on audio streams before
inserting/dropping samples (ns).</BLURB>
<DEFAULT>20000000</DEFAULT>
</ARG>

in:
gst-plugins-base/docs/plugins/gst-plugins-base-plugins.args

There is the only place where I found the "20000000" in gst-plugins-base,
gst-plugins-good and gstreamer source code.



----------
With aplay and arecord, I got a 2second overrun and underrun:

overrun!!! (at least 96.298 ms long)
overrun!!! (at least 51.389 ms long)
overrun!!! (at least 61.523 ms long)
overrun!!! (at least 52.045 ms long)
overrun!!! (at least 26.525 ms long)
overrun!!! (at least 2030.409 ms long)

underrun!!! (at least 72.038 ms long)
underrun!!! (at least 27.677 ms long)
underrun!!! (at least 38.223 ms long)
underrun!!! (at least 30.258 ms long)
underrun!!! (at least 4.933 ms long)
underrun!!! (at least 2012.711 ms long)

Time between underrun or overrun is unpredictable (100s, 20s, 400s…)

The pipeline is running since 50min without failing , and without "clock skew"
or "resyncing" log line.

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