The general feature provided by the remap filter is important in a number
of use cases. Lens distortion/correction is one that has been discussed
previously. But it is also a key feature in processing video material
intended for Virtual Reality and 360 degree playback. These workflows
employ non-linear reprojections of the frame in order to deliver video that
can be played back by VR-based (head mounted display) players.
The current implementation of the remap filter isn't well suited for this
task primarily because it is missing high-quality filtering logic similar
to what is available in swscale. I would like to propose that this be
addressed, and would like to either join or lead an effort to do so.
What thoughts do people have about this?
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