+ : runtime_error (String::compose (_("Cannot handle pixel format %1 during %2"), f, o))
+{
+
+}
+
+TextSubtitleError::TextSubtitleError (string saw, string expecting, boost::filesystem::path f)
+ : FileError (String::compose (_("Error in subtitle file: saw %1 while expecting %2"), saw.empty() ? "[nothing]" : saw, expecting), f)
+{
+
+}
+
+InvalidSignerError::InvalidSignerError ()
+ : runtime_error (_("The certificate chain for signing is invalid"))