fix: num-threads wasn't working since it was used before cli parsing

src/rs_t265_vio.cpp

@@ -137,6 +137,12 @@ int main(int argc, char** argv) {
   app.add_option("--num-threads", num_threads, "Number of threads.");
   app.add_option("--step-by-step", step_by_step, "Path to config file.");
 
+  try {
+    app.parse(argc, argv);
+  } catch (const CLI::ParseError& e) {
+    return app.exit(e);
+  }
+
   // global thread limit is in effect until global_control object is destroyed
   std::unique_ptr<tbb::global_control> tbb_global_control;
   if (num_threads > 0) {
@@ -144,12 +150,6 @@ int main(int argc, char** argv) {
         tbb::global_control::max_allowed_parallelism, num_threads);
   }
 
-  try {
-    app.parse(argc, argv);
-  } catch (const CLI::ParseError& e) {
-    return app.exit(e);
-  }
-
   if (!config_path.empty()) {
     vio_config.load(config_path);
   } else {

src/vio.cpp

@@ -222,6 +222,12 @@ int main(int argc, char** argv) {
                  "Save trajectory. Supported formats <tum, euroc, kitti>");
   app.add_option("--use-imu", use_imu, "Use IMU.");
 
+  try {
+    app.parse(argc, argv);
+  } catch (const CLI::ParseError& e) {
+    return app.exit(e);
+  }
+
   // global thread limit is in effect until global_control object is destroyed
   std::unique_ptr<tbb::global_control> tbb_global_control;
   if (num_threads > 0) {
@@ -229,12 +235,6 @@ int main(int argc, char** argv) {
         tbb::global_control::max_allowed_parallelism, num_threads);
   }
 
-  try {
-    app.parse(argc, argv);
-  } catch (const CLI::ParseError& e) {
-    return app.exit(e);
-  }
-
   if (!config_path.empty()) {
     vio_config.load(config_path);