Media control

[bkbilly]

Hello, I am trying to use dasbus library to control my media, but I am stuck and I would love your help.

from dasbus.connection import SessionMessageBus

bus = SessionMessageBus()
for service in bus.proxy.ListNames():
    if 'MediaPlayer2' in service:
        proxy = bus.get_proxy(service, "/org/mpris/MediaPlayer2")
        playback_status = proxy.Get("org.mpris.MediaPlayer2.Player", "PlaybackStatus")
        metadata = proxy.Get("org.mpris.MediaPlayer2.Player", "Metadata")
        position = proxy.Get("org.mpris.MediaPlayer2.Player", "Position")
        proxy.PlayPause()

I am able to get the metadata/position/playbackstatus, but I can't control it because the PlayPause attribute doesn't exist. This is the traceback of the code above:

Traceback (most recent call last):
  File "/home/bkbilly/Documents/dbus_mediaplayer.py", line 10, in <module>
    proxyplayer.PlayPause
  File "/home/bkbilly/venv/lib/python3.12/site-packages/dasbus/client/proxy.py", line 161, in __getattr__
    member = self._get_member(self._get_interface(name), name)
                              ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/bkbilly/venv/lib/python3.12/site-packages/dasbus/client/proxy.py", line 223, in _get_interface
    raise AttributeError(
AttributeError: DBus object has no attribute 'PlayPause'.

Is there another way of sending this PlayPause command?
Also is there a way to get a list of all available methods that the proxy supports?

[bkbilly]

It seems that I made a mistake and it needed the interface, but it still doesn't work:

from dasbus.connection import SessionMessageBus

bus = SessionMessageBus()
proxy = bus.get_proxy(
    service_name="org.mpris.MediaPlayer2.chromium.instance5082",
    object_path="/org/mpris/MediaPlayer2",
    interface_name="org.mpris.MediaPlayer2.Player",
)
proxy.PlayPause()

But I still get an error:

Traceback (most recent call last):
  File "/home/bkbilly/Documents/dbus_mediaplayer.py", line 9, in <module>
    proxy.PlayPause()
    ^^^^^^^^^^^^^^^
  File "/home/bkbilly/venv/lib/python3.12/site-packages/dasbus/client/proxy.py", line 161, in __getattr__
    member = self._get_member(self._get_interface(name), name)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/bkbilly/venv/lib/python3.12/site-packages/dasbus/client/proxy.py", line 126, in _get_member
    return self._create_member(*key)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/bkbilly/venv/lib/python3.12/site-packages/dasbus/client/proxy.py", line 149, in _create_member
    raise AttributeError(str(e)) from None
AttributeError: DBus specification has no member 'org.mpris.MediaPlayer2.Player.PlayPause'.

[bkbilly]

After a lot of hours searching, I managed to find how to send a message call to DBus. Apparently when it's using the interface_name, it doesn't get the attribute calls automatically so it has to be done manually.

This is the service call I used to control the media:

from dasbus.connection import SessionMessageBus
from gi.repository import Gio
bus = SessionMessageBus()
bus.connection.call(
    bus_name="org.mpris.MediaPlayer2.chromium.instance4730",
    object_path="/org/mpris/MediaPlayer2",
    interface_name="org.mpris.MediaPlayer2.Player",
    method_name="PlayPause",
    parameters=None,
    reply_type=None,
    flags=Gio.DBusCallFlags.NONE,
    timeout_msec=1,
    cancellable=None,
    callback=None,
    user_data=None,
)

If I could make a suggestion, it would be to add this to the documentation under the examples for others to use.