Index: libhb/common.c
===================================================================
--- libhb/common.c	(revision 1441)
+++ libhb/common.c	(working copy)
@@ -108,8 +108,13 @@
 void hb_fix_aspect( hb_job_t * job, int keep )
 {
     hb_title_t * title = job->title;
-    int          i;
+    int          i, mod;
 
+    if (job->modulus)
+        mod = job->modulus;
+    else
+        mod = 16;
+
     /* don't do anything unless the title has complete size info */
     if ( title->height == 0 || title->width == 0 || title->aspect == 0 )
     {
@@ -146,21 +151,21 @@
 
     if( keep == HB_KEEP_WIDTH )
     {
-        job->height = MULTIPLE_16(
+        job->height = MULTIPLE_MOD(
             (uint64_t) job->width * title->width * HB_ASPECT_BASE *
               ( title->height - job->crop[0] - job->crop[1] ) /
             ( (uint64_t) title->height * title->aspect *
-              ( title->width - job->crop[2] - job->crop[3] ) ) );
-        job->height = MAX( 16, job->height );
+              ( title->width - job->crop[2] - job->crop[3] ) ), mod );
+        job->height = MAX( mod, job->height );
     }
     else
     {
-        job->width = MULTIPLE_16(
+        job->width = MULTIPLE_MOD(
             (uint64_t) job->height * title->height * title->aspect *
               ( title->width - job->crop[2] - job->crop[3] ) /
             ( (uint64_t) title->width * HB_ASPECT_BASE *
-              ( title->height - job->crop[0] - job->crop[1] ) ) );
-        job->width = MAX( 16, job->width );
+              ( title->height - job->crop[0] - job->crop[1] ) ), mod );
+        job->width = MAX( mod, job->width );
     }
 }