diff --git a/lib/mp4.cpp b/lib/mp4.cpp
index 1753b0f8..c24c9e90 100644
--- a/lib/mp4.cpp
+++ b/lib/mp4.cpp
@@ -96,6 +96,11 @@ void Box::ResetPayload( ) {
   ((unsigned int*)Payload)[0] = htonl(0);
 }
 
+std::string Box::toPrettyString(int indent){
+  return std::string(indent, ' ')+"Unimplemented pretty-printing for this box";
+}
+
+
 void ABST::SetBootstrapVersion( uint32_t Version ) {
   curBootstrapInfoVersion = Version;
 }
@@ -255,6 +260,33 @@ void ABST::WriteContent( ) {
   SetPayload((uint32_t)4,Box::uint32_to_uint8(curBootstrapInfoVersion),4);
 }
 
+std::string ABST::toPrettyString(int indent){
+  std::string r;
+  r += std::string(indent, ' ')+"Bootstrap Info\n";
+  if (isUpdate){
+    r += std::string(indent+1, ' ')+"Update\n";
+  }else{
+    r += std::string(indent+1, ' ')+"Replacement or new table\n";
+  }
+  if (isLive){
+    r += std::string(indent+1, ' ')+"Live\n";
+  }else{
+    r += std::string(indent+1, ' ')+"Recorded\n";
+  }
+  r += std::string(indent+1, ' ')+"Profile "+JSON::Value((long long int)curProfile).asString()+"\n";
+  r += std::string(indent+1, ' ')+"Timescale "+JSON::Value((long long int)curTimeScale).asString()+"\n";
+  r += std::string(indent+1, ' ')+"CurrMediaTime "+JSON::Value((long long int)curMediatime).asString()+"\n";
+  r += std::string(indent+1, ' ')+"Segment Run Tables "+JSON::Value((long long int)SegmentRunTables.size()).asString()+"\n";
+  for( uint32_t i = 0; i < SegmentRunTables.size(); i++ ) {
+    r += ((ASRT*)SegmentRunTables[i])->toPrettyString(indent+2)+"\n";
+  }
+  r += std::string(indent+1, ' ')+"Fragment Run Tables "+JSON::Value((long long int)FragmentRunTables.size()).asString()+"\n";
+  for( uint32_t i = 0; i < FragmentRunTables.size(); i++ ) {
+    r += ((AFRT*)FragmentRunTables[i])->toPrettyString(indent+2)+"\n";
+  }
+  return r;
+}
+
 void AFRT::SetUpdate( bool Update ) {
   isUpdate = Update;
 }
@@ -316,6 +348,26 @@ void AFRT::WriteContent( ) {
   SetPayload((uint32_t)4,Box::uint32_to_uint8((isUpdate ? 1 : 0)));
 }
 
+std::string AFRT::toPrettyString(int indent){
+  std::string r;
+  r += std::string(indent, ' ')+"Fragment Run Table\n";
+  if (isUpdate){
+    r += std::string(indent+1, ' ')+"Update\n";
+  }else{
+    r += std::string(indent+1, ' ')+"Replacement or new table\n";
+  }
+  r += std::string(indent+1, ' ')+"Timescale "+JSON::Value((long long int)curTimeScale).asString()+"\n";
+  r += std::string(indent+1, ' ')+"Qualities "+JSON::Value((long long int)QualitySegmentUrlModifiers.size()).asString()+"\n";
+  for( uint32_t i = 0; i < QualitySegmentUrlModifiers.size(); i++ ) {
+    r += std::string(indent+2, ' ')+"\""+QualitySegmentUrlModifiers[i]+"\"\n";
+  }
+  r += std::string(indent+1, ' ')+"Fragments "+JSON::Value((long long int)FragmentRunEntryTable.size()).asString()+"\n";
+  for( uint32_t i = 0; i < FragmentRunEntryTable.size(); i ++ ) {
+    r += std::string(indent+2, ' ')+"Duration "+JSON::Value((long long int)FragmentRunEntryTable[i].FragmentDuration).asString()+", starting at "+JSON::Value((long long int)FragmentRunEntryTable[i].FirstFragment).asString()+" @ "+JSON::Value((long long int)FragmentRunEntryTable[i].FirstFragmentTimestamp).asString();
+  }
+  return r;
+}
+
 void ASRT::SetUpdate( bool Update ) {
   isUpdate = Update;
 }
@@ -364,6 +416,25 @@ void ASRT::WriteContent( ) {
   SetPayload((uint32_t)4,Box::uint32_to_uint8((isUpdate ? 1 : 0)));
 }
 
+std::string ASRT::toPrettyString(int indent){
+  std::string r;
+  r += std::string(indent, ' ')+"Segment Run Table\n";
+  if (isUpdate){
+    r += std::string(indent+1, ' ')+"Update\n";
+  }else{
+    r += std::string(indent+1, ' ')+"Replacement or new table\n";
+  }
+  r += std::string(indent+1, ' ')+"Qualities "+JSON::Value((long long int)QualitySegmentUrlModifiers.size()).asString()+"\n";
+  for( uint32_t i = 0; i < QualitySegmentUrlModifiers.size(); i++ ) {
+    r += std::string(indent+2, ' ')+"\""+QualitySegmentUrlModifiers[i]+"\"\n";
+  }
+  r += std::string(indent+1, ' ')+"Segments "+JSON::Value((long long int)SegmentRunEntryTable.size()).asString()+"\n";
+  for( uint32_t i = 0; i < SegmentRunEntryTable.size(); i ++ ) {
+    r += std::string(indent+2, ' ')+JSON::Value((long long int)SegmentRunEntryTable[i].FragmentsPerSegment).asString()+" fragments per, starting at "+JSON::Value((long long int)SegmentRunEntryTable[i].FirstSegment).asString();
+  }
+  return r;
+}
+
 std::string mdatFold(std::string data){
   std::string Result;
   unsigned int t_int;
diff --git a/lib/mp4.h b/lib/mp4.h
index 50cad77f..d7354ad7 100644
--- a/lib/mp4.h
+++ b/lib/mp4.h
@@ -25,6 +25,7 @@ namespace MP4{
       static uint8_t * uint16_to_uint8( uint16_t data );
       static uint8_t * uint8_to_uint8( uint8_t data );
       void ResetPayload( );
+      std::string toPrettyString(int indent = 0);
     private:
       uint8_t * Payload;
       uint32_t PayloadSize;
@@ -58,6 +59,7 @@ namespace MP4{
       void AddFragmentRunTable( Box * newFragment, uint32_t Offset = 0 );
       void SetVersion( bool NewVersion = 0 );
       void WriteContent( );
+      std::string toPrettyString(int indent = 0);
     private:
       void SetDefaults( );
       void SetReserved( );
@@ -95,6 +97,7 @@ namespace MP4{
       void AddQualityEntry( std::string Quality = "", uint32_t Offset = 0 );
       void AddFragmentRunEntry( uint32_t FirstFragment = 0, uint32_t FirstFragmentTimestamp = 0, uint32_t FragmentsDuration = 1, uint8_t Discontinuity = 0, uint32_t Offset = 0 );
       void WriteContent( );
+      std::string toPrettyString(int indent = 0);
     private:
       void SetDefaults( );
       bool isUpdate;
@@ -117,6 +120,7 @@ namespace MP4{
       void AddSegmentRunEntry( uint32_t FirstSegment = 0, uint32_t FragmentsPerSegment = 100, uint32_t Offset = 0 );
       void WriteContent( );
       void SetVersion( bool NewVersion = 0 );
+      std::string toPrettyString(int indent = 0);
     private:
       void SetDefaults( );
       bool isUpdate;