Sets an error within the asynchronous result without a GError Unless writing a binding, see SimpleAsyncResult.setError.
a GQuark (usually G_IO_ERROR).
an error code.
a formatted error reporting string.
va_list of arguments.
Deprecated: Use gstreamer.Task and Task.returnError instead.
Sets an error within the asynchronous result without a GError Unless writing a binding, see SimpleAsyncResult.setError.