[FFmpeg-devel] [RFC] Proposal for improved remap filter

Paul Holland paul at pixvana.com
Thu May 17 23:14:52 EEST 2018

I am sure there are multiple ways to achieve this.  My current idea is to
teach/enhance swscale to perform the basic logic for it.  In that sort of
design it would be able to reuse most of the existing, highly optimized
filtering functions - as well as all of its to, and from, planar format
conversion logic.  But I am also open to pursing other ideas if people
think that would be better than an swscale-based design.

On Thu, May 17, 2018 at 12:41 PM, Paul B Mahol <onemda at gmail.com> wrote:

> On 5/17/18, Paul Holland <paul at pixvana.com> wrote:
> > 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 exactly need to be added/implemented for remap filter?
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