Creates a new #GstNavigation message with type #GST_NAVIGATION_MESSAGE_ANGLES_CHANGED for notifying an application that the current angle, or current number of angles available in a multiangle video has changed.
A #GstObject to set as source of the new message.
The currently selected angle.
The number of viewing angles now available.
The new #GstMessage.
Creates a new #GstNavigation message with type #GST_NAVIGATION_MESSAGE_ANGLES_CHANGED for notifying an application that the current angle, or current number of angles available in a multiangle video has changed.