My goal is to quickly create equirectangular videos from full-frame fisheye videos with a given hfov. Panoramatools, especially mpremap allow that but it takes long for each single picture. Given that gpu and 8-core cpu can be used, which program can do that quickly?
You can do that very easily in After Effects. Import your footage/images, create a new composition that matches your footage/images specifications and then apply Optics Compensation (Effect> Distort > Optics Compensation. Tweak Field of View values until you have the desired result. In some cases you will need to check the Reverse Lens Distortion box.