From e5edd51de458d52f3824e6d8fc7c0713659694a4 Mon Sep 17 00:00:00 2001
From: Philipp Hagemeister <phihag@phihag.de>
Date: Fri, 8 Mar 2013 20:12:05 +0100
Subject: [PATCH] Clear up error messages (#734)

---
 youtube_dl/FileDownloader.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/youtube_dl/FileDownloader.py b/youtube_dl/FileDownloader.py
index 57f741c306..3b2adf84be 100644
--- a/youtube_dl/FileDownloader.py
+++ b/youtube_dl/FileDownloader.py
@@ -372,8 +372,11 @@ class FileDownloader(object):
 
             filename = self.params['outtmpl'] % template_dict
             return filename
-        except (ValueError, KeyError) as err:
-            self.trouble(u'ERROR: invalid system charset or erroneous output template')
+        except KeyError as err:
+            self.trouble(u'ERROR: Erroneous output template')
+            return None
+        except ValueError as err:
+            self.trouble(u'ERROR: Insufficient system charset ' + repr(preferredencoding()))
             return None
 
     def _match_entry(self, info_dict):