Unwrapping software for 360 videos running on Linux

We need some software running on Linux to unwrap a 360x240 degree spherical image to equirectangular. In a similar way to nona (part of hugin tools, see example frames) but in a way we can pipe images through it hopefully in realtime. The source frames are from an mp4 video. You can ingest the movie frames directly or we can provide frames for you in any format to pipe in. The important thing is we need the frames piped out of your software so we can do additional post processing. Video samples will be supplied on request. Ownership of the software and all its associated copyrights pass to the buyer.