[gst-devel] gstreamer interaction with Gnome

[Stefan Kost]

Jim McCloskey wrote:
> I hope it's OK to ask for help with user difficulties on this list. I
> am at my wits' end trying to understand this problem and nobody on the
> Debian lists has been able to help.
>
> OS: Debian testing (squeeze)
> libgstreamer0.10-0, version 0.10.26
>
> The problem has to do with audio playback:
>
> All basic alsa applications work fine (aplay, alsaplayer, mpg321,
> ogg123 etc); audio playback with mplayer (and derivatives) works fine;
> audio playback with xine (and derivatives) works fine.
>
> But with all and only the audio players that use gstreamer as their
> backend (rhythmbox, banshee, listen and so on), the track seems to
> play, no errors are reported, but there is silence.
>
> However, this on the command-line:
>
>   gst-launch-0.10 filesrc location="miles-ahead.ogg" ! oggdemux ! vorbisdec ! audioconvert ! audioresample ! alsasink
>
> produces great audio playback, as does this:
>
>   gst-launch-0.10 filesrc location="conamara.mp3" ! mad ! audioconvert ! audioresample ! alsasink
>
> Also this:
>
>    gst-launch-0.10 filesrc location="coinnleach.wav" ! wavparse ! alsasink
>
> works great.
>
>    gst-launch-0.10 audiotestsrc ! alsasink
>
> produces a pure tone.
>
> All of this seems to suggest that there is nothing inherently wrong
> either with the gstreamer setup or with the alsa setup.
>
> However, this:
>
>    gst-launch-0.10 playbin uri=file:///home/jim/Music/coinnleach.wav
>    gst-launch-0.10 playbin2 uri=file:///home/jim/Music/coinnleach.wav
>
> produces no errors:
>
>     Setting pipeline to PAUSED ...
>     Pipeline is PREROLLING ...
>     Pipeline is PREROLLED ...
>     Setting pipeline to PLAYING ...
>     New clock: GstPulseSinkClock
>
> but produces only silence.  No audible playback. If Gnome applications
> in general use playbin or playbin2, perhaps this is the ultimate source 
> of the problem?
>   
run
> gstreamer-properties
what audiosink is selected there?

Stefan
> Any help, or pointers to relevant documentation, would be really appreciated.
>
> Thank you very much,
>
> Jim
>
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