ArViz: Record initial timestamp and revision

source/RobotAPI/components/ArViz/ArVizStorage.cpp

@@ -314,9 +314,16 @@ std::string armarx::ArVizStorage::startRecording(std::string const& newRecording
         recordingBuffer.clear();
 
         recordingMetaData.id = newRecordingID;
-        recordingMetaData.firstRevision = -1;
+        {
+            std::unique_lock<std::mutex> lock(historyMutex);
+            if (history.size() > 0)
+            {
+                auto& mostRecent = history.back();
+                recordingMetaData.firstRevision = mostRecent.revision;
+                recordingMetaData.firstTimestampInMicroSeconds = mostRecent.timestampInMicroseconds;
+            }
+        }
         recordingMetaData.lastRevision = 0;
-        recordingMetaData.firstTimestampInMicroSeconds = -1;
         recordingMetaData.lastTimestampInMicroSeconds = 0;
         recordingMetaData.batchHeaders.clear();
     }