Correcting green/pink tint near edge of video on DVD?

[GlitchBob]

Usually found by the edge of the video, sometimes the right side, other times the left. Tends to shift between green and pink/purple depending on the content. First line is generally the strongest in color, then the second is more faded. Found on ADV DVDs from 2000, not something introduced by any filters I'm using.


[Attachment 58952 - Click to enlarge]

[Attachment 58953 - Click to enlarge]


[Attachment 58954 - Click to enlarge]

[Attachment 58955 - Click to enlarge]


Normally I'd just crop it out, but lately I've been wondering if there's a a better way, a way that might eliminate it and have those pixels look their correct colors.

Any possible combination of AviSynth filters that might accomplish this? Or is it just impossible to fix and cropping is all anyone can do?

[Sharc]

My interpretation:
The solid black is probably due to pillarboxing or padding of the active picture to 720 pixel standard DVD width.
The 2 colored rows is ringing from filters or from the encoding process due to the sharp transition from full black to the active picture.
Crop the source before encoding to prevent sharp transitions from pillarboxing leftovers to the active picture, or just crop it off for viewing.

[GlitchBob]

Thank you, I suspected as much.

[jagabo]

You can stretch or copy the good chroma from just to the left of discolored area over the discolored area.

ImageSource("green_lines.png", start=0, end=23, fps=23.976) 
ConvertToYV12()
patch = Overlay(last, Crop(714,0,4,-0), x=716, y=0)
MergeChroma(last, patch)

[Attachment 58969 - Click to enlarge]

[GlitchBob]

You can stretch or copy the good chroma from just to the left of discolored area over the discolored area.

ImageSource("green_lines.png", start=0, end=23, fps=23.976) 
ConvertToYV12()
patch = Overlay(last, Crop(714,0,4,-0), x=716, y=0)
MergeChroma(last, patch)

[Attachment 58969 - Click to enlarge]

Wow! I had no idea that was possible. Thanks very much!

Out of curiosity (and inexperience with using this function), if I had green/pink on both sides, what would be the best way to address right and left?

[jagabo]

Add another patch:

ImageSource("green_lines.png", start=0, end=23, fps=23.976) 
ConvertToYV12()
patch = Overlay(last, Crop(714,0,4,-0), x=716, y=0)
patch = Overlay(patch, patch.Crop(4,0,4,-0), x=0, y=0)
MergeChroma(last, patch)

[jagabo]

Here's a variation that stretches the chroma from the good areas rather than copying it:

ImageSource("green_lines.png", start=0, end=23, fps=23.976) 
ConvertToYV12()
patch = Overlay(last, Crop(716,0,2,-0).PointResize(4,height), x=716, y=0)
patch = Overlay(patch, patch.Crop(2,0,2,-0).PointResize(4,height), x=0, y=0)
MergeChroma(last, patch)

[GlitchBob]

Here's a variation that stretches the chroma from the good areas rather than copying it:

ImageSource("green_lines.png", start=0, end=23, fps=23.976) 
ConvertToYV12()
patch = Overlay(last, Crop(716,0,2,-0).PointResize(4,height), x=716, y=0)
patch = Overlay(patch, patch.Crop(2,0,2,-0).PointResize(4,height), x=0, y=0)
MergeChroma(last, patch)

I had a feeling that was the way, but wasn't sure how to do it properly. Excellent, thank you very much jagabo!

[manono]

The BorderControl filter is good for this sort of thing:

BorderControl(XRS=3,XRSF=3)