[FFmpeg-user] remap filter, unmapped pixels

Michael Koch astroelectronic at t-online.de
Thu Feb 20 07:12:35 EET 2020

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?


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