diff --git a/oxdbarchive/extract.py b/oxdbarchive/extract.py
index 5c2cf82..dc5cbd5 100644
--- a/oxdbarchive/extract.py
+++ b/oxdbarchive/extract.py
@@ -11,6 +11,8 @@ import time
 from subtitles import time2ms
 
 
+img_extension="jpg"
+
 def extract_flash_ng(movie_file, flash_file, inpoint, outpoint, width=128, height=96, offset = 0):
   ext = movie_file.split('.')[-1]
   if ext in ('sub', 'srt'):
diff --git a/oxdbarchive/json.py b/oxdbarchive/json.py
index c1f0aa3..edf1c35 100644
--- a/oxdbarchive/json.py
+++ b/oxdbarchive/json.py
@@ -18,9 +18,12 @@ def jsonify_ArchiveFile(obj):
   result = jsonify_sqlobject( obj )
   #FIXME, possibly do something with the date values
   # date, date_added, modDate, pubDate
-  for key in ('date_added', 'modDate', 'pubDate', 'date'):
-    result[key] = time.mktime(getattr(obj, key).timetuple())
-
-  for key in ('id', 'archiveID', 'subtitle_meta_id'):
+  _key_map= {
+   'published': 'pubDate',
+   'modified': 'modDate',
+  }
+  for key in ('date_added', 'published', 'modified', 'date'):
+    result[_key_map.get(key, key)] = time.mktime(getattr(obj, key).timetuple())
+  for key in ('id', 'subtitle_meta_id'):
     result.pop(key)
   return result