When playing back data from file using OpenEB (5.0.0) using the code below (simplified), the data packets are delivered not in real-time (usually much faster). Is there anything that I'm doing wrong?
```
const auto cfg = Metavision::FileConfigHints().real_time_playback(true);
cam = Metavision::Camera::from_file("file_name", cfg);
cam.raw_data().add_callback(std::bind(&MyClass::rawDataCallback, this, ph::_1, ph::_2));
cam.start();
```