[Gstreamer-bugs] [Bug 142493] New: - default fragment size in osssink is too small

[bugzilla-daemon at bugzilla.gnome.org]

http://bugzilla.gnome.org/show_bug.cgi?id=142493
GStreamer | gst-plugins | Ver: 0.8.1

           Summary: default fragment size in osssink is too small
           Product: GStreamer
           Version: 0.8.1
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins
        AssignedTo: gstreamer-maint at bugzilla.gnome.org
        ReportedBy: dcm at acm.org
         QAContact: gstreamer-maint at bugzilla.gnome.org


The default value of the "fragment" parameter in osssink is 6.  This means that
the fragment size is 2^6 = 64.  On two of my machines, whenever there is a
moderate amount of I/O activity, osssink produces lots of static in addition to
the proper output.  Changing the "fragment" value to 8 (a fragment size of 256
bytes) solves the problem.

According to the 4front documentation for OSS at
http://www.4front-tech.com/pguide/audio2.html:

"With relatively short fragments this may cause whining sound which is very
difficult to identify. Using fragment sizes shorter than 256 bytes is not
recommended as the default mode of application. Short fragments should only be
used when explicitly requested by user."

So I would suggest changing the default value of "fragment" from 6 to 8.

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