diff -Naur mpeg4ip/lib/mp4v2/atom_tkhd.cpp mpeg4ip_patched/lib/mp4v2/atom_tkhd.cpp
--- mpeg4ip/lib/mp4v2/atom_tkhd.cpp	2003-11-19 23:46:11.000000000 +0000
+++ mpeg4ip_patched/lib/mp4v2/atom_tkhd.cpp	2007-02-15 15:58:06.000000000 +0000
@@ -61,7 +61,8 @@
 	pProp->SetFixed16Format();
 	AddProperty(pProp); /* 8 */
 
-	AddReserved("reserved3", 38); /* 9 */
+	/* patched by maurj to enable us to set the matrix for anamorphic display */
+	AddProperty(new MP4BytesProperty("reserved3", 38)); /* 9 */
 
 	pProp = new MP4Float32Property("width");
 	pProp->SetFixed32Format();
@@ -106,7 +107,8 @@
 	m_pProperties[9]->SetReadOnly(false);
 	((MP4BytesProperty*)m_pProperties[9])->
 		SetValue(reserved3, sizeof(reserved3));
-	m_pProperties[9]->SetReadOnly(true);
+	/* patched by maurj to enable us to set the matrix for anamorphic display */
+	/* m_pProperties[9]->SetReadOnly(true);*/
 }
 
 void MP4TkhdAtom::Read()