Index: libhb/muxmp4.c
===================================================================
--- libhb/muxmp4.c	(revision 1055)
+++ libhb/muxmp4.c	(working copy)
@@ -240,6 +240,8 @@
 
 	if( job->pixel_ratio ) {
 
+        MP4AddPixelAspectRatio(m->file, mux_data->track, job->pixel_aspect_width, job->pixel_aspect_height);
+        
 		uint8_t* val;
 		uint8_t nval[38];
 		uint32_t *ptr32 = (uint32_t*) (nval + 2);