get_error

If the stream is in an error state, returns the `GError` explaining that state.

Any type of error can be reported here depending on the implementation of the media stream.

A media stream in an error cannot be operated on, calls like [method@Gtk.MediaStream.play] or [method@Gtk.MediaStream.seek] will not have any effect.

`GtkMediaStream` itself does not provide a way to unset an error, but implementations may provide options. For example, a [class@Gtk.MediaFile] will unset errors when a new source is set, e.g. with [method@Gtk.MediaFile.set_file].

Parameters:

this	a `GtkMediaStream`

Returns:

null if not in an error state or the `GError` of the stream