[writer] remove cam number, simplify writing done signal

writer.cpp

@@ -37,7 +37,7 @@ void Writer::run() {
     // Releases all pylon resources.
     // PylonTerminate();
     // Return with error code 1.
-    emit writingDone(this->cam_number);
+    emit writingDone();
     return;
   }
   qDebug() << "checks done!";
@@ -114,7 +114,12 @@ void Writer::run() {
                 }
               }
               if (count < chunksize) {
+                try {
                   stamps_buffer[count] = nix::util::timeToStr(img->timestamp());
+                } catch (...) {
+                  std::cerr << "Bad time to string conversion " << img->timestamp() << std::endl;
+                  stamps_buffer[count] = "invalid";
+                }
                 ids_buffer[count] = img->index();
                 count ++;
               } else {
@@ -138,11 +143,11 @@ void Writer::run() {
             frametimes.setData(nix::DataType::String, stamps_buffer.data(), chunk_shape, offset);
             frameindices.setData(nix::DataType::Int64, ids_buffer.data(), chunk_shape, offset);
         }
-        // videoWriter.Close();
+        videoWriter.Close();
         myFile.close();
         nix_file.close();
     } else {
       std::cerr << "Got no video specifications, not writing!" << std::endl;
     }
-  emit writingDone(cam_number);
+  emit writingDone();
 }

writer.h

@@ -15,8 +15,8 @@ class Writer : public QThread
 {
   Q_OBJECT
 public:
-  explicit Writer(ImageBuffer*buffer, int number, QObject *parent = nullptr) :
+  explicit Writer(ImageBuffer*buffer, QObject *parent = nullptr) :
-    QThread(parent), buffer(buffer), cam_number(number) {}
+    QThread(parent), buffer(buffer) {}
 
    void setVideoSpecs(VideoSpecs specs);
    void setProjectMetadata(ProjectMetadata mdata);
@@ -25,10 +25,9 @@ public:
 
 signals:
   void terminated();
-  void writingDone(int cam);
+  void writingDone();
 
 private:
-  int cam_number;
   ImageBuffer *buffer;
   VideoSpecs videoSpecs;
   ProjectMetadata metadata;