diff --git a/bin/ffx.py b/bin/ffx.py
index d09540f..0d4becc 100755
--- a/bin/ffx.py
+++ b/bin/ffx.py
@@ -45,7 +45,8 @@ def generateCropTokens(start, length):
 def generateOutputTokens(f, q=''):
     if q:
         fTokens = f.split('.')
-        return ['-f', 'webm', fTokens[:-1] + [f" q{q}"] + fTokens[-1]]    
+        paddedFilename = '.'.join(fTokens[:-1] + [f" q{q}"] + [fTokens[-1]])
+        return ['-f', 'webm', paddedFilename]    
     else:
         return ['-f', 'webm', f]