Index: trunk/ppStack/src/ppStackArguments.c
===================================================================
--- trunk/ppStack/src/ppStackArguments.c	(revision 19045)
+++ trunk/ppStack/src/ppStackArguments.c	(revision 19123)
@@ -175,4 +175,5 @@
     psMetadataAddBool(arguments, PS_LIST_TAIL, "-temp-delete", 0,
                       "Delete temporary files on completion?", false);
+    psMetadataAddS32(arguments, PS_LIST_TAIL, "-threads", 0, "Number of threads to use", 0);
 
     if (argc == 1 || !psArgumentParse(arguments, &argc, argv) || argc != 3) {
@@ -194,4 +195,10 @@
 
     valueArgStr(arguments, "-stats", "STATS", arguments);
+
+    int numThreads = psMetadataLookupS32(NULL, arguments, "-threads"); // Number of threads
+    if (numThreads > 0 && !psThreadPoolInit(numThreads)) {
+        psError(PS_ERR_UNKNOWN, false, "Unable to setup %d threads", numThreads);
+        return false;
+    }
 
     return true;