diff --git a/oxdbarchive/model.py b/oxdbarchive/model.py
index 7dc322f..c456e5a 100644
--- a/oxdbarchive/model.py
+++ b/oxdbarchive/model.py
@@ -224,7 +224,7 @@ class ArchiveFile(SQLObject):
   video = UnicodeCol()
   length = IntCol()
   size = IntCol()
-  bpp = IntCol(default = 0)
+  bpp = FloatCol(default = -1)
   pixels = IntCol(default = 0)
   
   date_added = DateTimeCol(default = datetime.now)
@@ -561,10 +561,10 @@ class ArchiveFile(SQLObject):
   
   def updateBpp(self):
     if self.height and self.width and self.fps and self.bitrate:
-      bpp = int(self.height * self.width * self.fps / self.bitrate)
+      bpp = float(self.height * self.width * self.fps / self.bitrate)
       self.bpp = bpp
     else:
-      bpp = 0
+      bpp = -1
     return bpp
   
   def updatePixels(self):