diff --git a/src/common/hacks.cpp b/src/common/hacks.cpp
index 0993c808a..0a373ac37 100644
--- a/src/common/hacks.cpp
+++ b/src/common/hacks.cpp
@@ -37,6 +37,7 @@ static const char *mosu_hacks[] = {
   ENGAGE_NO_DEFAULT_HEADER_VALUES,
   ENGAGE_FORCE_PASSTHROUGH_PACKETIZER,
   ENGAGE_AVC_USE_BFRAMES,
+  ENGAGE_WRITE_HEADERS_TWICE,
   NULL
 };
 static vector<string> engaged_hacks;
diff --git a/src/common/hacks.h b/src/common/hacks.h
index bb99b9fe4..89f47a6fc 100644
--- a/src/common/hacks.h
+++ b/src/common/hacks.h
@@ -34,6 +34,7 @@ using namespace std;
 #define ENGAGE_NO_DEFAULT_HEADER_VALUES "no_default_header_values"
 #define ENGAGE_FORCE_PASSTHROUGH_PACKETIZER "force_passthrough_packetizer"
 #define ENGAGE_AVC_USE_BFRAMES "avc_use_bframes"
+#define ENGAGE_WRITE_HEADERS_TWICE "write_headers_twice"
 
 void MTX_DLL_API engage_hacks(const string &hacks);
 bool MTX_DLL_API hack_engaged(const string &hack);
diff --git a/src/merge/output_control.cpp b/src/merge/output_control.cpp
index fd0c15bef..29fd70fa1 100644
--- a/src/merge/output_control.cpp
+++ b/src/merge/output_control.cpp
@@ -1441,6 +1441,14 @@ finish_file(bool last_file) {
 
   mxinfo("\n");
 
+  // Render the track headers a second time if the user has requested that.
+  if (hack_engaged(ENGAGE_WRITE_HEADERS_TWICE)) {
+    EbmlElement *second_tracks = kax_tracks.Clone();
+    second_tracks->Render(*out);
+    kax_sh_main->IndexThis(*second_tracks, *kax_segment);
+    delete second_tracks;
+  }
+
   // Render the cues.
   if (write_cues && cue_writing_requested) {
     if (verbose >= 1)
@@ -1503,6 +1511,12 @@ finish_file(bool last_file) {
   }
   out->restore_pos();
 
+  // Render the segment info a second time if the user has requested that.
+  if (hack_engaged(ENGAGE_WRITE_HEADERS_TWICE)) {
+    kax_infos->Render(*out);
+    kax_sh_main->IndexThis(*kax_infos, *kax_segment);
+  }
+
   // Select the chapters that lie in this file and render them in the space
   // that was resesrved at the beginning.
   if (kax_chapters != NULL) {