[FFmpeg-trac] #8459(avfilter:open): V360 + BLEND

[FFmpeg]

#8459: V360 + BLEND
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             Reporter:  villmer      |                    Owner:  villmer
                 Type:  enhancement  |                   Status:  open
             Priority:  wish         |                Component:  avfilter
              Version:  git-master   |               Resolution:
             Keywords:  v360         |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by mkoch):

 Yes, this is a post-stitching process to soften the left of the two
 vertical lines. Did you use the input image fli0z.png that you uploaded
 here? It works only if you know exactly at which x position the vertical
 line is. In this case between x=249 and x=250.
 Your output image seems to be bigger than the original input image.

 Here is a better Windows batch file that also softens the other line
 between x=749 and x=750.

 set "FF=c:\ffmpeg\ffmpeg"   :: Path to FFmpeg
 set "IN=fli0z.png"          :: Input image
 set "B1=249"              :: Left side of first vertical border, right
 side is at B1+1
 set "B2=749"              :: Left side of second vertical border, right
 side is at B2+1
 set "W=25"                :: Width of interpolation area

 %FF% -i %IN% -vf
 "geq=cb_expr='cb(X,Y)':cr_expr='cr(X,Y)':lum_expr='lum(X,Y)+between(X,%B1%-%W%,%B1%)*lerp((X-%B1%+%W%)/%W%,0,lum(%B1%,Y)-lum(%B1%+1,Y))+between(X,%B2%-%W%,%B2%)*lerp((X-%B2%+%W%)/%W%,0,lum(%B2%,Y)-lum(%B2%+1,Y))',format=rgb24"
 -y out.png

 pause

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Ticket URL: <https://trac.ffmpeg.org/ticket/8459#comment:11>
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