rem: g_set_error (error, 0, 0, "Too old version of GStreamer installed");
add: g_set_error (error, BVW_ERROR, BVW_ERROR_GENERIC, _("Too old version of GStreamer installed."));
context: bacon_video_widget_can_get_frames (BaconVideoWidget * bvw, GError ** error){  g_return_val_if_fail (bvw != NULL, FALSE);  g_return_val_if_fail (BACON_IS_VIDEO_WIDGET (bvw), FALSE);  g_return_val_if_fail (GST_IS_ELEMENT (bvw->priv->play), FALSE);  /* check for version */  if (!g_object_class_find_property (           G_OBJECT_GET_CLASS (bvw->priv->play), "frame")) {    g_set_error (error, 0, 0,        "Too old version of GStreamer installed");    return FALSE;  }  /* check for video */  if (!bvw->priv->media_has_video) {    g_set_error (error, 0, 0,        "Media contains no supported video streams");  }  return bvw->priv->media_has_video;}