[gstreamer-bugs] [Bug 593021] New: Audio CD playback grossly choppy - cdparanoiasrc bug?

[GStreamer (bugzilla.gnome.org)]

http://bugzilla.gnome.org/show_bug.cgi?id=593021

           Summary: Audio CD playback grossly choppy - cdparanoiasrc bug?
    Classification: Desktop
           Product: GStreamer
           Version: 0.10.21
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: williamnorfleet2000 at yahoo.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


--- Comment #0 from williamnorfleet2000 at yahoo.com 2009-08-25 14:43:35 UTC ---
Banshee (and Rhythmbox) plays an audio CD for exactly 16 s, freezes for about
12 s, runs ahead, freezes again, etc. 

These commands produce choppy playback:
   gst-launch cdparanoiasrc mode=1 ! audioconvert ! audioresample ! alsasink
Adjusting element properties such as blocksize, read-speed, and paranoia-mode
does not help.
  gst-launch playbin uri=cdda://
Fiddling with the playbin element properties such as "delay", "queue-size",
"queue-threshold", and "queue-min-threshold" can improve things somewhat, but
does not eliminate the problem.  

This command produces normal playback:
   gst-launch cdiocddasrc mode=1 ! audioconvert ! audioresample ! alsasink

Running Banshee via a terminal with --debug set reveals nothing striking during
choppy audio CD playback.  Top does not reveal huge cpu usage by Banshee or
related processes.  Other features of Banshee seem to work fine. IBM Thinkpad
600E (as well as a Dell Inspiron 7500), Fedora 10, kernel
2.6.27.25-170.2.72.fc10.i686, banshee-1.4.2-4.fc10.i386,
gstreamer-0.10.21-2.fc10.i386, pulseaudio removed, ALSA selected as the
preferred playback method.  Audio CDs play fine under Grip. Rhythmbox used to
work fine on this machine in the Fedora 8 era. /var/log/messages reveals
nothing.  Audio CD playback by Banshee is normal when played through an
external USB DVD drive rather than the Thinkpad's internal CD drive.  Per the
Banshee forum, Banshee uses playbin to play audio CDs.  

Almost as an aside, simply running cdparanoia by itself in a terminal smoothly
rips a CD much faster than playback speed.

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