DBus connection to omxplayer won't work

fl0mll

Hy, I try to write a wrapper to navigate the omxplayer on raspberry pi 2. The script dbuscontroll.sh works but the Qt source code do not work.

I am not sure if the application is connected? This is the code:

    QDBusConnection *_dbus;
    _dbus = new QDBusConnection(QDBusConnection::sessionBus());
    _dbus->connectToBus(address, "org.mpris.MediaPlayer2.omxplayer");

    if( !_dbus->isConnected() ) {
        qDebug() << "not connected";
    }

    QString dest = "org.mpris.MediaPlayer2.omxplayer";
    QString path = "/org/mpris/MediaPlayer2/";
    QString interface = "org.mpris.MediaPlayer2.Player";
    QString name = "Action";
    QDBusMessage msg = QDBusMessage::createMethodCall(dest, path, interface, name);
    msg.setArguments(QList<QVariant>() << 16);
    if( !_dbus->send(msg) ) {
        qWarning() << "error: " << _dbus->lastError().message();
    }

And I got this output on the console:

Unable to query physical screen size, defaulting to 100 dpi.
To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).
"unix:abstract=/tmp/dbus-FHoNnz9gMj"
QDBusConnectionPrivate(0x72208478) : connected successfully
not connected
error:  "Not connected to D-Bus server"
QDBusConnectionPrivate(0x72208478) got message (signal): QDBusMessage(type=Signal, service="org.freedesktop.DBus", path="/org/freedesktop/DBus", interface="org.freedesktop.DBus", member="NameAcquired", signature="s", contents=(":1.29") )

I am connected with ssh and use the dbus-monitor. It display the following output:

signal sender=org.freedesktop.DBus -> dest=(null destination) serial=8 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameOwnerChanged
   string ":1.33"
   string ""
   string ":1.33"
method call sender=:1.33 -> dest=org.freedesktop.DBus serial=1 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=Hello

Can anyone tell me what's going wrong and why the message is not queued?

fl0mll

I think that I found the solution. I will test something and post the result later.

fl0mll

The solution is to set some environment variables. I set the address in qt but the environments are required for the libdbus library.

Set the

DBUS_SESSION_BUS_ADDRESS

and

DBUS_SESSION_BUS_PID

eluppai

Hello,

I am performing a similar operation. How are you actually passing the address ?