I am looking for some software to analyse fish behaviour and activity (for instance swimming velocity and fast startle response) from video recorded files.
What for you are looking for such software? For researching fish or for catching them? I don't want to prejudice, but if the second, you are on the false and robbing side of the planet and you should rethink it.
Track3D will not help you with previously recorded videos. However, you can try out our software for free. We are able to track your fish videos on our web-based app at www.behaviorcloud.com. You can get the free demo there, or you can contact me at [email protected]
I'd be happy to help you optimize your setup and help you process and analyze your videos.