CSV file get's named after video input file

src/openCV/main.cpp

@@ -48,6 +48,7 @@ int main(int argc, char** argv) {
   }
 
   filesystem::path videoPath(argv[1]);
+  filesystem::path csvExtention(".csv");
   if(videoPath.extension() != ".mp4") {
     cerr << "Failed to read input; make sure it is a valid .mp4 video file." << endl;
     cerr << "Current input: " << argv[1];
@@ -55,7 +56,7 @@ int main(int argc, char** argv) {
   }
 
   // Currently using Myggbukta-[2021-05-21_10-47-06]-716 as test.mp4.
-  ofstream csv = createCSV("test.csv")
+  ofstream csv = createCSV(videoPath.replace_extension(csvExtention);
   VideoCapture decoder(videoPath.string());
   auto start = chrono::steady_clock::now();