diff --git a/lib/dtsc.cpp b/lib/dtsc.cpp
index 55eae8c8..bb35ff21 100644
--- a/lib/dtsc.cpp
+++ b/lib/dtsc.cpp
@@ -975,18 +975,15 @@ bool DTSC::isFixed(JSON::Value & metadata){
       continue;
     }
     if (!it->second["keys"].isString()){
-      std::cerr << "Not fixed because keys for track " << it->second["trackid"].asInt() << " is not a string" << std::endl;
       return false;
     }
     //Check for bpos: last element bpos != 0
     std::string keyRef = it->second["keys"].asStringRef();
     if (keyRef.size() < 16){
-      std::cerr << "No keys in track " << it->second["trackid"].asInt() << std::endl;
       return false;
     }
     int offset = keyRef.size() - 17;
     if (!(keyRef[offset] | keyRef[offset+1] | keyRef[offset+2] | keyRef[offset+3] | keyRef[offset+4])){
-      std::cerr << "Not fixed because last bpos for track " << it->second["trackid"].asInt() << " it 0" << std::endl;
       return false;
     }
   }
diff --git a/lib/dtscmeta.cpp b/lib/dtscmeta.cpp
index 26bbf4ad..108ea619 100644
--- a/lib/dtscmeta.cpp
+++ b/lib/dtscmeta.cpp
@@ -809,7 +809,6 @@ namespace DTSC {
         continue;
       }
       if (!it->second.keys.size() || !(it->second.keys.rbegin()->getBpos())){
-        std::cerr << "Not fixed while track " << it->first << " has " << it->second.keys.size() << "keyframes" << std::endl;
         return false;
       }
     }