diff --git a/lib/bitfields.h b/lib/bitfields.h
index 186a064c..96b7605f 100644
--- a/lib/bitfields.h
+++ b/lib/bitfields.h
@@ -51,6 +51,51 @@ namespace Bit{
     p[2] = val & 0xFF;
   }
 
+  /// Retrieves a 40-bit uint in network order from the pointer p.
+  inline uint64_t btoh40(const char * p) {
+    return ((uint64_t)p[0] << 32) | ((uint64_t)p[1] << 24) | ((uint64_t)p[2] << 16) | ((uint64_t)p[3] << 8) | p[4];
+  }
+
+  /// Stores a 40-bit uint value of val in network order to the pointer p.
+  inline void htob40(char * p, uint64_t val) {
+    p[0] = (val >> 32) & 0xFF;
+    p[1] = (val >> 24) & 0xFF;
+    p[2] = (val >> 16) & 0xFF;
+    p[3] = (val >> 8) & 0xFF;
+    p[4] = val & 0xFF;
+  }
+
+  /// Retrieves a 48-bit uint in network order from the pointer p.
+  inline uint64_t btoh48(const char * p) {
+    return ((uint64_t)p[0] << 40) | ((uint64_t)p[1] << 32) | ((uint64_t)p[2] << 24) | ((uint64_t)p[3] << 16) | ((uint64_t)p[4] << 8) | p[5];
+  }
+
+  /// Stores a 48-bit uint value of val in network order to the pointer p.
+  inline void htob48(char * p, uint64_t val) {
+    p[0] = (val >> 40) & 0xFF;
+    p[1] = (val >> 32) & 0xFF;
+    p[2] = (val >> 24) & 0xFF;
+    p[3] = (val >> 16) & 0xFF;
+    p[4] = (val >> 8) & 0xFF;
+    p[5] = val & 0xFF;
+  }
+
+  /// Retrieves a 56-bit uint in network order from the pointer p.
+  inline uint64_t btoh56(const char * p) {
+    return ((uint64_t)p[0] << 48) | ((uint64_t)p[1] << 40) | ((uint64_t)p[2] << 32) | ((uint64_t)p[3] << 24) | ((uint64_t)p[4] << 16) | ((uint64_t)p[5] << 8) | p[6];
+  }
+
+  /// Stores a 56-bit uint value of val in network order to the pointer p.
+  inline void htob56(char * p, uint64_t val) {
+    p[0] = (val >> 48) & 0xFF;
+    p[1] = (val >> 40) & 0xFF;
+    p[2] = (val >> 32) & 0xFF;
+    p[3] = (val >> 24) & 0xFF;
+    p[4] = (val >> 16) & 0xFF;
+    p[5] = (val >> 8) & 0xFF;
+    p[6] = val & 0xFF;
+  }
+
   /// Retrieves a long long in network order from the pointer p.
   inline unsigned long long btohll(const char * p) {
     return ((unsigned long long)p[0] << 56) | ((unsigned long long)p[1] << 48) | ((unsigned long long)p[2] << 40) | ((unsigned long long)p[3] << 32) | ((unsigned long)p[4] << 24) | ((unsigned long)p[5] << 16) | ((unsigned long)p[6] << 8) | p[7];
@@ -68,6 +113,24 @@ namespace Bit{
     p[7] = val & 0xFF;
   }
 
+  inline float btohf(const char * p){
+    uint32_t tmp = btohl(p);
+    return *reinterpret_cast<float*>(&tmp);
+  }
+
+  inline float htobf(char * p, float val){
+    htobl(p, *reinterpret_cast<unsigned long*>(&val));
+  }
+
+  inline double btohd(const char * p){
+    uint64_t tmp = btohll(p);
+    return *reinterpret_cast<double*>(&tmp);
+  }
+
+  inline float htobd(char * p, double val){
+    htobll(p, *reinterpret_cast<unsigned long*>(&val));
+  }
+
   /// Retrieves a short in little endian from the pointer p.
   inline unsigned short btohs_le(const char * p) {
     return ((unsigned short)p[1] << 8) | p[0];
diff --git a/lib/dtscmeta.cpp b/lib/dtscmeta.cpp
index fa14827b..47302ae5 100644
--- a/lib/dtscmeta.cpp
+++ b/lib/dtscmeta.cpp
@@ -1406,6 +1406,20 @@ namespace DTSC {
     return keys[keyNum - keys[0].getNumber()];
   }
 
+  ///\brief Returns a fragment given its number, or an empty fragment if the number is out of bounds
+  Fragment & Track::getFrag(unsigned int fragNum) {
+    static Fragment empty;
+    if (!fragments.size() || fragNum < fragments[0].getNumber() || fragNum > fragments.rbegin()->getNumber()) {
+      return empty;
+    }
+    for (std::deque<Fragment>::iterator it = fragments.begin(); it != fragments.end(); ++it){
+      if (fragNum >= it->getNumber() && fragNum <= it->getNumber() + it->getLength()){
+        return *it;
+      }
+    }
+    return empty;
+  }
+
   /// Returns the number of the key containing timestamp, or last key if nowhere.
   unsigned int Track::timeToKeynum(unsigned int timestamp){
     unsigned int result = 0;
diff --git a/lib/socket.cpp b/lib/socket.cpp
index 2607c47d..c2e2e395 100644
--- a/lib/socket.cpp
+++ b/lib/socket.cpp
@@ -341,6 +341,7 @@ Socket::Connection::Connection(int sockNo){
   conntime = Util::epoch();
   Error = false;
   Blocking = false;
+  skipCount = 0;
 }// Socket::Connection basic constructor
 
 /// Simulate a socket using two file descriptors.
@@ -355,6 +356,7 @@ Socket::Connection::Connection(int write, int read){
   conntime = Util::epoch();
   Error = false;
   Blocking = false;
+  skipCount = 0;
 }// Socket::Connection basic constructor
 
 /// Create a new disconnected base socket. This is a basic constructor for placeholder purposes.
@@ -368,6 +370,7 @@ Socket::Connection::Connection(){
   conntime = Util::epoch();
   Error = false;
   Blocking = false;
+  skipCount = 0;
 }// Socket::Connection basic constructor
 
 void Socket::Connection::resetCounter(){
@@ -629,6 +632,11 @@ void Socket::Connection::SendNow(const std::string &data){
   SendNow(data.data(), data.size());
 }
 
+void Socket::Connection::skipBytes(uint32_t byteCount){
+  INFO_MSG("Skipping first %lu bytes going to socket", byteCount);
+  skipCount = byteCount;
+}
+
 /// Incremental write call. This function tries to write len bytes to the socket from the buffer,
 /// returning the amount of bytes it actually wrote.
 /// \param buffer Location of the buffer to write from.
@@ -636,6 +644,18 @@ void Socket::Connection::SendNow(const std::string &data){
 /// \returns The amount of bytes actually written.
 unsigned int Socket::Connection::iwrite(const void *buffer, int len){
   if (!connected() || len < 1){return 0;}
+  if (skipCount){
+    //We have bytes to skip writing.
+    //Pretend we write them, but don't really.
+    if (len <= skipCount){
+      skipCount -= len;
+      return len;
+    }else{
+      unsigned int retCode = iwrite((((char*)buffer)+skipCount), len-skipCount);
+      skipCount = 0;
+      return retCode;
+    }
+  }
   int r;
   if (sock >= 0){
     r = send(sock, buffer, len, 0);
diff --git a/lib/socket.h b/lib/socket.h
index 73c391c3..cf8a4749 100644
--- a/lib/socket.h
+++ b/lib/socket.h
@@ -106,6 +106,8 @@ namespace Socket{
     void SendNow(const std::string &data);      ///< Will not buffer anything but always send right away. Blocks.
     void SendNow(const char *data);             ///< Will not buffer anything but always send right away. Blocks.
     void SendNow(const char *data, size_t len); ///< Will not buffer anything but always send right away. Blocks.
+    void skipBytes(uint32_t byteCount);
+    uint32_t skipCount;
     // stats related methods
     unsigned int connTime();             ///< Returns the time this socket has been connected.
     uint64_t dataUp();                   ///< Returns total amount of bytes sent.
diff --git a/lib/util.h b/lib/util.h
index 9d0c560e..d721885f 100644
--- a/lib/util.h
+++ b/lib/util.h
@@ -1,3 +1,4 @@
+#pragma once
 #include <deque>
 #include <map>
 #include <stdint.h>
diff --git a/src/input/input.cpp b/src/input/input.cpp
index 5dfd6195..353d1521 100644
--- a/src/input/input.cpp
+++ b/src/input/input.cpp
@@ -611,6 +611,20 @@ namespace Mist {
       }
     }
   }
+  
+  void Input::trackSelect(std::string trackSpec){
+    selectedTracks.clear();
+    size_t index;
+    while (trackSpec != "") {
+      index = trackSpec.find(' ');
+      selectedTracks.insert(atoi(trackSpec.substr(0, index).c_str()));
+      if (index != std::string::npos) {
+        trackSpec.erase(0, index + 1);
+      } else {
+        trackSpec = "";
+      }
+    }
+  }
 
   void Input::parseHeader() {
     if (hasSrt){
diff --git a/src/input/input.h b/src/input/input.h
index fe6ee55c..0f2b53b0 100644
--- a/src/input/input.h
+++ b/src/input/input.h
@@ -46,7 +46,7 @@ namespace Mist {
       void quitPlay();
       void checkHeaderTimes(std::string streamFile);
       virtual void removeUnused();
-      virtual void trackSelect(std::string trackSpec){};
+      virtual void trackSelect(std::string trackSpec);
       virtual void userCallback(char * data, size_t len, unsigned int id);
       virtual void convert();
       virtual void serve();
diff --git a/src/io.cpp b/src/io.cpp
index f53f01a6..30773c83 100644
--- a/src/io.cpp
+++ b/src/io.cpp
@@ -29,6 +29,20 @@ namespace Mist {
 
   }
 
+  /// Returns the ID of the main selected track, or 0 if no tracks are selected.
+  /// The main track is the first video track, if any, and otherwise the first other track.
+  long unsigned int InOutBase::getMainSelectedTrack(){
+    if (!selectedTracks.size()){
+      return 0;
+    }
+    for (std::set<long unsigned int>::iterator it = selectedTracks.begin(); it != selectedTracks.end(); it++){
+      if (myMeta.tracks.count(*it) && myMeta.tracks[*it].type == "video"){
+        return *it;
+      }
+    }
+    return *(selectedTracks.begin());
+  }
+
   void negotiationProxy::clear(){
     pagesByTrack.clear();
     trackOffset.clear();
diff --git a/src/io.h b/src/io.h
index 77523fa8..10d36e1e 100644
--- a/src/io.h
+++ b/src/io.h
@@ -77,6 +77,7 @@ namespace Mist {
       void bufferFinalize(unsigned long tid);
       void bufferRemove(unsigned long tid, unsigned long pageNumber);
       virtual void bufferLivePacket(const DTSC::Packet & packet);
+      long unsigned int getMainSelectedTrack();
     protected:
       void continueNegotiate(unsigned long tid, bool quickNegotiate = false);
       void continueNegotiate();
diff --git a/src/output/output.cpp b/src/output/output.cpp
index 7b0dc291..e8595bd1 100644
--- a/src/output/output.cpp
+++ b/src/output/output.cpp
@@ -1246,20 +1246,6 @@ namespace Mist{
     return 0;
   }
   
-  /// Returns the ID of the main selected track, or 0 if no tracks are selected.
-  /// The main track is the first video track, if any, and otherwise the first other track.
-  long unsigned int Output::getMainSelectedTrack(){
-    if (!selectedTracks.size()){
-      return 0;
-    }
-    for (std::set<long unsigned int>::iterator it = selectedTracks.begin(); it != selectedTracks.end(); it++){
-      if (myMeta.tracks.count(*it) && myMeta.tracks[*it].type == "video"){
-        return *it;
-      }
-    }
-    return *(selectedTracks.begin());
-  }
-
   void Output::dropTrack(uint32_t trackId, std::string reason, bool probablyBad){
     //depending on whether this is probably bad and the current debug level, print a message
     unsigned int printLevel = DLVL_INFO;
diff --git a/src/output/output.h b/src/output/output.h
index aed5318b..ae2ec56b 100644
--- a/src/output/output.h
+++ b/src/output/output.h
@@ -54,7 +54,6 @@ namespace Mist {
       uint64_t endTime();
       uint64_t liveTime();
       void setBlocking(bool blocking);
-      long unsigned int getMainSelectedTrack();
       void updateMeta();
       void selectTrack(const std::string &trackType, const std::string &trackVal); /*LTS*/
       void selectDefaultTracks();