'Problems with Phonon'

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List:       kde-devel
Subject:    Problems with Phonon
From:       Ferdinand_Nölscher <root () rapidcc ! com>
Date:       2012-06-10 18:39:52
Message-ID: 4FD4E9F8.50500 () rapidcc ! com
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I don't know whether this is the right place for such problems, if not,
please forward this message.

I recently installed the phonon and gstreamer development packages and
after I did that, I noticed strange behaviour of certain api calls, not
only in my own program but in many other QT/Phonon programs as well.

Everytime the application calls MediaObject.stop() the sound/video stops
playing and the whole event loop suddenly stops processing for about a
second. The GUI stops being responsive. My backend is gstreamer with
pulseaudio but the vlc backend is also affected by this.

When running with "PHONON_BACKEND_DEBUG=5 PHONON_PULSEAUDIO_DEBUG=5
PHONON_SUBSYSTEM_DEBUG=5 PHONON_DEBUG=5" I can see all the state changes
but nothing special, except error messages like

QPixmap: It is not safe to use pixmaps outside the GUI thread

being thrown after the event loop starts again. I have not tested this
with any other application, though.

Any help is greatly appreciated.

kind regards,
Ferdinand Nölscher

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    I don't know whether this is the right place for such problems, if
    not, please forward this message.<br>
    <br>
    I recently installed the phonon and gstreamer development packages
    and after I did that, I noticed strange behaviour of certain api
    calls, not only in my own program but in many other QT/Phonon
    programs as well.<br>
    <br>
    Everytime the application calls MediaObject.stop() the sound/video
    stops playing and the whole event loop suddenly stops processing for
    about a second. The GUI stops being responsive. My backend is
    gstreamer with pulseaudio but the vlc backend is also affected by
    this.<br>
    <br>
    When running with "PHONON_BACKEND_DEBUG=5 PHONON_PULSEAUDIO_DEBUG=5
    PHONON_SUBSYSTEM_DEBUG=5 PHONON_DEBUG=5" I can see all the state
    changes but nothing special, except error messages like <span
      style=" font-family:'Monospace'; font-size:10pt; color:#1f1c1b;"></span><br>
    <br>
    <!--EndFragment-->
    <meta http-equiv="Content-Type" content="text/html;
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p, li { white-space: pre-wrap; }
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    <p style="margin: 0px; text-indent: 0px;"><!--StartFragment--><span
        style="font-family: 'Monospace'; font-size: 10pt; color: rgb(31,
        28, 27);">QPixmap: It is not safe to use pixmaps outside the GUI
        thread<br>
      </span><span style="font-family: 'Monospace'; font-size: 10pt;
        color: rgb(31, 28, 27);"></span><br>
    </p>
    being thrown after the event loop starts again. I have not tested
    this with any other application, though.<br>
    <br>
    Any help is greatly appreciated.<br>
    <br>
    kind regards,<br>
    Ferdinand N&ouml;lscher<br>
    <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
      margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span
        style=" font-family:'Monospace'; font-size:10pt; color:#1f1c1b;"></span><!--EndFragment--></p>
    <meta http-equiv="Content-Type" content="text/html;
      charset=ISO-8859-1">
    <style type="text/css">
p, li { white-space: pre-wrap; }
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