are coloumns artifacts correctable? - sample

[maudit]

Hello,

I'm trying to fix the edges/borders of a frame as usual.
I have already encountered these kind of artifacts, and didn't care too much 'bout them,
I'm talking about the different bright in the columns 1 and 1478(of the scripted frame), which is it is not continuous, but intermittent.
The effect is that you see some kind of "holes".
but now I'd like to know if there's a command to fix a specified column in order to vanish/shade/fade away those artifacts.
I mean something like bbmod but that works vertically on a single column.

does it exist?

this is the source frame: https://www.dropbox.com/s/x7j3ozjhxsgyjn4/1%20source.png?dl=0

this is the script I'm using

crop(220, 0, -220, 0)
FixCBr(0,32).FixCBr(1479,32)
bbmod(0,0,2,2,128,8)

this is the result: https://www.dropbox.com/s/qnuan9jml9inl4o/2%20rip.png?dl=0

as you see artifacts are not fully corrected, no matter how high is the bbmod value. (which anyway I'd like to keep under 2)

[rrats]

What is the artefact

[maudit]

What is the artefact

that kind of dotted line, darker and lighter, like a morse code, the columns 1 and 1478.

https://www.dropbox.com/s/bejzuipyu4lj28v/sdr%20ss2.png?dl=0

[rrats]

That looks like video compression. Nothing special