[gstreamer-bugs] [Bug 591043] New: Short crackle after approx 1/4 second of playback

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gstreamer (core) | Ver: 0.10.22
           Summary: Short crackle after approx 1/4 second of playback
           Product: GStreamer
           Version: 0.10.22
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: glywood at gmail.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


This problem is most evident when pidgin plays sound effects, but I do not
believe it is specific to pidgin because it can be reproduced from the
gstreamer command line:

gst-launch filesrc location=/usr/share/sounds/purple/login.wav ! decodebin !
audioconvert ! audioresample ! alsasink

To better describe exactly what I am hearing: this particular audio file
contains three short ascending tones. The first tone sounds correct, and plays
for about 1/4 second. The second tone has a bit of crackly fuzz at the very
beginning, then quickly resolves into the correct sound. The rest of the file
plays flawlessly. The crackle is very short (maybe 1/16 of a second), but it is
annoyingly obvious.

This problem is not 100% reproducible. About half the time the sound plays
normally, and half the time it exhibits the problem. The precise sound of the
crackle varies; it makes me think of uninitialized variables. The problem also
occurs when playing other audio or video files, not just the one listed above.
It also happens when using the osssink (which ends up going through alsa
emultaion anyway, I believe). It happens regardless of volume.

If I play the file using "aplay /usr/share/sounds/purple/login.wav" the problem
never occurs, which is why I believe this is a gstreamer bug.

I do not have PulseAudio installed.


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