diff --git a/converter/__init__.py b/converter/__init__.py
index 73430d7..e83d8d7 100644
--- a/converter/__init__.py
+++ b/converter/__init__.py
@@ -121,9 +121,12 @@ def parse_options(self, opt, twopass=None):
             else:
                 format_options.extend(['-map', str(m)])
 
+        thread_opt = []
+        if 'threads' in opt:
+            thread_opt.extend(['-threads', str(opt['threads'])])
 
         # aggregate all options
-        optlist = audio_options + video_options + subtitle_options + format_options
+        optlist = audio_options + video_options + subtitle_options + format_options + thread_opt
 
         if twopass == 1:
             optlist.extend(['-pass', '1'])