How do I combine two combed half-pictures so that the resulting picture is
screened?
Combed input frame:
11111...
22222...
Desired output frame:
12121...
21212...
It occurs to me that I need to unweave the half-pictures, line-double both, screen both via
pixel-sized screens that are offset by 1 pix, then reweave them.
I've not found a line-doubling filter and I've not found a screen method that
actually works.
Also, a method to zoom pixels in the output so I can actually see them individually without a
magnifying glass would be very helpful.
I've tried every filter I could find that has anything to do with blending, screening, blurring,
etc., but I may have missed something.
A really ambitious method would be: Replace the combed frame with a synthesized frame that's a
motion-vector meld of the preceding and subsequent progressive frames, but that seems pretty wild
and probably beyond ffmpeg's capabilities, but I simply don't know.
Thanks,
Mark.
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