diff --git a/oxdbarchive/model.py b/oxdbarchive/model.py
index aa023aa..fcb3afe 100644
--- a/oxdbarchive/model.py
+++ b/oxdbarchive/model.py
@@ -512,7 +512,10 @@ class ArchiveFile(SQLObject):
   
   def extractPosterStill(self, position):
     oxdb_makedir(dirname(self.posterStillFile))
-    extract_poster_still(self.absolutePath, self.posterStillFile, position)
+    mFile = self.absolutePath
+    if mFile.endswith('.mov') or mFile.endswith('.mpg'):
+      mFile = self.mini_movie_file
+    extract_poster_still(mFile, self.posterStillFile, position)
 
   def extractClipMovie(self, force = False): 
     if self.broken: