--- a/avidemux_plugins/ADM_videoEncoder/x264/ADM_x264Setup.cpp

+++ b/avidemux_plugins/ADM_videoEncoder/x264/ADM_x264Setup.cpp

@@ -89,8 +89,8 @@

   // Threads..

   switch(x264Settings.general.threads)

   {

-    case 1: case 2: case 4: param.i_threads = x264Settings.general.threads;break;

-    case 0: case 99: break; //auto

+    case 0: case 1: case 2:  param.i_threads = x264Settings.general.threads;break;

+    case 99:break; //auto

     default: ADM_error("UNKNOWN NB OF THREADS\n");break;

   }

   param.i_width = getWidth();

​