Or a way to do it with an existing filter? So that you could take in video from a fisheye or dual fisheye camera (such as the Ricoh Theta) and directly output equirectangular, in real-time, to some...

I used open framework to convert dual fisheye video (received from ricoh theta S camera) to equirectangular format (for an iOS application). dual fisheye image sample: equirectangular image sam...