:right-sidebar: True

SystemClock
===================================================================

.. currentmodule:: gi.repository.Gst





.. class:: SystemClock(**properties: ~typing.Any)
   :no-contents-entry:


Superclasses: :class:`~gi.repository.Gst.Clock`, :class:`~gi.repository.Gst.Object`, :class:`~gi.repository.GObject.InitiallyUnowned`, :class:`~gi.repository.GObject.Object`





The GStreamer core provides a GstSystemClock based on the system time.
Asynchronous callbacks are scheduled from an internal thread.

Clock implementors are encouraged to subclass this systemclock as it
implements the async notification.

Subclasses can however override all of the important methods for sync and
async notifications to implement their own callback methods or blocking
wait operations.




Methods
-------

.. rst-class:: interim-class

.. class:: SystemClock
   :no-index:


   .. classmethod:: obtain() -> ~gi.repository.Gst.Clock

      Get a handle to the default system clock. The refcount of the
      clock will be increased so you need to unref the clock after
      usage.









   .. classmethod:: set_default() -> None

      Sets the default system clock that can be obtained with
      :func:`~gi.repository.Gst.SystemClock.obtain`.

      This is mostly used for testing and debugging purposes when you
      want to have control over the time reported by the default system
      clock.

      MT safe.


      .. versionadded:: 1.4












Properties
----------

.. rst-class:: interim-class

.. class:: SystemClock
   :no-index:
   

   .. attribute:: props.clock_type
      :type: ~gi.repository.Gst.ClockType

      The type of the None singleton.















Fields
------

.. rst-class:: interim-class

.. class:: SystemClock
   :no-index:
   

   .. attribute:: clock

      






   .. attribute:: priv