Minor improvements to the processing panel

- It is now possible to actually see what's processing, due to a bug fix
  where __getitem__ was called on the db model.
- Removed DEPRECATED message from the docstring, it wasn't true.

mediagoblin/media_types/video/processing.py

@@ -19,13 +19,22 @@ import logging
 
 from mediagoblin import mg_globals as mgg
 from mediagoblin.processing import \
-    create_pub_filepath, FilenameBuilder
+    create_pub_filepath, FilenameBuilder, BaseProcessingFail
+from mediagoblin.tools.translate import lazy_pass_to_ugettext as _
+
 from . import transcoders
 
 _log = logging.getLogger(__name__)
 _log.setLevel(logging.DEBUG)
 
 
+class VideoTranscodingFail(BaseProcessingFail):
+    '''
+    Error raised if video transcoding fails
+    '''
+    general_message = _(u'Video transcoding failed')
+
+
 def sniff_handler(media_file, **kw):
     transcoder = transcoders.VideoTranscoder()
     data = transcoder.discover(media_file.name)