diff --git a/src/analysers/dtsc_analyser.cpp b/src/analysers/dtsc_analyser.cpp
index 3f97e44f..a53e0d1b 100644
--- a/src/analysers/dtsc_analyser.cpp
+++ b/src/analysers/dtsc_analyser.cpp
@@ -26,42 +26,53 @@ namespace Analysers {
     }
 
     if (conf.getBool("compact")){
+      bool hasH264 = false;
+      bool hasAAC = false;
+      bool unstable_keys = false;
+      bool unstable_parts = false;
       JSON::Value result;
+      std::stringstream issues;
       for (std::map<unsigned int, DTSC::Track>::iterator it = F.getMeta().tracks.begin(); it != F.getMeta().tracks.end(); it++){
         JSON::Value track;
-        if (it->second.type=="video"){
-          std::stringstream tStream;
-          track["resolution"] = JSON::Value((long long)it->second.width).asString() + "x" + JSON::Value((long long)it->second.height).asString();
-          track["fps"] = (long long)((double)it->second.fpks / 1000);
-          track["fpks"] = it->second.fpks;
-          tStream << it->second.bps * 8 << " b/s, " << (double)it->second.bps * 8 / 1024 << " kb/s, " << (double)it->second.bps * 8 / 1024 / 1024 << " mb/s";
-          track["bitrate"] = tStream.str();
-          tStream.str("");
-          track["keyframe_duration"] = (long long)((float)(it->second.lastms - it->second.firstms) / it->second.keys.size());
-          tStream << ((double)(it->second.lastms - it->second.firstms) / it->second.keys.size()) / 1000;
-          track["keyframe_interval"] = tStream.str(); 
-
-          tStream.str("");
-          if (it->second.codec == "H264"){
-            h264::sequenceParameterSet sps;
-            sps.fromDTSCInit(it->second.init);
-            h264::SPSMeta spsData = sps.getCharacteristics();
-            track["encoding"]["width"] = spsData.width;
-            track["encoding"]["height"] = spsData.height;
-            tStream << spsData.fps;
-            track["encoding"]["fps"] = tStream.str();
-            track["encoding"]["profile"] = spsData.profile;
-            track["encoding"]["level"] = spsData.level;
-          }
+        track["kbits"] = (long long)((double)it->second.bps * 8 / 1024);
+        track["codec"] = it->second.codec;
+        uint32_t shrtest_key = 0xFFFFFFFFul;
+        uint32_t longest_key = 0;
+        uint32_t shrtest_prt = 0xFFFFFFFFul;
+        uint32_t longest_prt = 0;
+        uint32_t shrtest_cnt = 0xFFFFFFFFul;
+        uint32_t longest_cnt = 0;
+        for (std::deque<DTSC::Key>::iterator k = it->second.keys.begin(); k != it->second.keys.end(); k++){
+          if (!k->getLength()){continue;}
+          if (k->getLength() > longest_key){longest_key = k->getLength();}
+          if (k->getLength() < shrtest_key){shrtest_key = k->getLength();}
+          if (k->getParts() > longest_cnt){longest_cnt = k->getParts();}
+          if (k->getParts() < shrtest_cnt){shrtest_cnt = k->getParts();}
+          if ((k->getLength()/k->getParts()) > longest_prt){longest_prt = (k->getLength()/k->getParts());}
+          if ((k->getLength()/k->getParts()) < shrtest_prt){shrtest_prt = (k->getLength()/k->getParts());}
         }
-        if (it->second.type == "audio"){
-          std::stringstream tStream;
-          tStream << it->second.bps * 8 << " b/s, " << (double)it->second.bps * 8 / 1024 << " kb/s, " << (double)it->second.bps * 8 / 1024 / 1024 << " mb/s";
-          track["bitrate"] = tStream.str();
-          track["keyframe_interval"] = (long long)((float)(it->second.lastms - it->second.firstms) / it->second.keys.size());
+        track["keys"]["min"] = (long long)shrtest_key;
+        track["keys"]["max"] = (long long)longest_key;
+        track["prts"]["min"] = (long long)shrtest_prt;
+        track["prts"]["max"] = (long long)longest_prt;
+        track["count"]["min"] = (long long)shrtest_cnt;
+        track["count"]["max"] = (long long)longest_cnt;
+        if (shrtest_key < longest_key / 2){issues << it->second.codec << " key duration unstable (variable key interval!) (" << shrtest_key << "-" << longest_key << ")! ";}
+        if ((shrtest_prt < longest_prt / 2) && (shrtest_cnt != longest_cnt)){issues << it->second.codec << " part duration unstable (bad connection!) (" << shrtest_prt << "-" << longest_prt << ")! ";}
+        if (it->second.codec == "AAC"){hasAAC = true;}
+        if (it->second.codec == "H264"){hasH264 = true;}
+        if (it->second.type=="video"){
+          track["width"] = (long long)it->second.width;
+          track["height"] = (long long)it->second.height;
+          track["fpks"] = it->second.fpks;
         }
         result[it->second.getWritableIdentifier()] = track;
       }
+      if (hasAAC || hasH264){
+        if (!hasAAC){issues << "video-only! ";}
+        if (!hasH264){issues << "audio-only! ";}
+      }
+      if (issues.str().size()){result["issues"] = issues.str();}
       std::cout << result.toString();
       return 0;
     }