[FFmpeg-user] Calculating offset of shifted line
Ulf.Zibis at gmx.de
Fri Jan 11 11:11:47 EET 2019
a polite ping ...
Am 09.01.19 um 01:22 schrieb Ulf Zibis:
> I would like to calculate how much a special line in the video is
> irregularly shifted to right or left. For this I want to compare the
> line with the adjacent line above by calculating the minimum of the
> quadratic mean for each shift.
> I'm first looking for something like:
> x:=0; y:=123; diff:= 0; while(x++ < in_w, diff += (luma(x,y) - luma(x,y
> - 1))²);
> So the first question is: how to get the luma value of a pixel?
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