diff --git a/src/buffer/player.cpp b/src/buffer/player.cpp
index 29743676..491e9e7f 100644
--- a/src/buffer/player.cpp
+++ b/src/buffer/player.cpp
@@ -83,7 +83,7 @@ int main(int argc, char** argv){
   DTSC::File source = DTSC::File(conf.getString("filename"));
   in_out.SendNow(source.getMeta().toNetPacked());
 
-  if (DTSC::isFixed(source.getMeta())){
+  if ( !DTSC::isFixed(source.getMeta())){
     std::cerr << "Encountered a non-fixed file." << std::endl;
     return 1;
   }
diff --git a/src/controller/controller_streams.cpp b/src/controller/controller_streams.cpp
index 43813176..2d7318cd 100644
--- a/src/controller/controller_streams.cpp
+++ b/src/controller/controller_streams.cpp
@@ -70,8 +70,10 @@ namespace Controller {
         }
         if ( !DTSC::isFixed(data["meta"])){
           char * tmp_cmd[3] = {0, 0, 0};
-          std::string mistfix = Util::getMyPath() + "MistDTSCFix " + URL;
-          Util::Procs::Start("MistFixer", mistfix);
+          std::string mistfix = Util::getMyPath() + "MistDTSCFix";
+          tmp_cmd[0] = (char*)mistfix.c_str();
+          tmp_cmd[1] = (char*)URL.c_str();
+          Util::Procs::StartPiped("MistFixer", tmp_cmd, 0, 0, 0);
         }
         if (Util::epoch() - lastBuffer[name] > 5){
           data["error"] = "Available";
diff --git a/src/info.cpp b/src/info.cpp
index b44b8e1e..1c6be0ca 100644
--- a/src/info.cpp
+++ b/src/info.cpp
@@ -90,6 +90,9 @@ namespace Info {
       fileSpecs.removeMember( "streams" );
     } else {
       fileSpecs["format"] = "dtsc";
+      if (DTSC::isFixed(fileSpecs)){
+        fileSpecs["is_fixed"] = 1ll;
+      }
       JSON::Value tracks = fileSpecs["tracks"];
       for(JSON::ObjIter trackIt = tracks.ObjBegin(); trackIt != tracks.ObjEnd(); trackIt++){
         if (fileSpecs["tracks"][trackIt->first].isMember("init")){