diff --git a/pyffmpeg/__init__.py b/pyffmpeg/__init__.py
index 9190a52..a8e60d6 100644
--- a/pyffmpeg/__init__.py
+++ b/pyffmpeg/__init__.py
@@ -155,10 +155,10 @@ def convert(self, input_file, output_file):
         if 'Output #0' not in stderr:
             lines = stderr.splitlines()
             if len(lines) > 0:
-                self.error = "".join(lines) # instead of lines[-1]
+                self.error = "".join(lines)  # instead of lines[-1]
                 self.error = "New error info: " + self.error
             else:
-                self.error = "Error but nothing much"
+                self.error = "Error all: " + str(stderr)
 
             if self.enable_log:
                 self.logger.error(self.error)