[FFmpeg-user] remap filter, unmapped pixels

Paul B Mahol onemda at gmail.com
Thu Feb 20 12:07:21 EET 2020

On 2/20/20, Michael Koch <astroelectronic at t-online.de> wrote:
> I'd like to understand how the new "fill" option in the remap filter works.
> What is an "unmapped pixel"? How is it possible that pixels are
> unmapped, if the xmap and ymap files have the same size as the output
> image? Is a pixel "unmapped" if it has invalid coordinates (negative or
> too big) in the xmap or ymap files?

Previously all unmapped pixels were set to black for rgba or dark
green for y420p.
It is very obvious to understand even for every little kid in the block.

> Michael
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